Solving Quadratic Equations by Factoring
30 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the first step to solve a quadratic equation using the completing the square method?

  • Divide the equation by the coefficient of x^2 (correct)
  • Factor the quadratic equation
  • Convert the equation to the form of difference of two squares
  • Identify the roots of the equation

In the quadratic equation x^2 - 5x - 3 = 0, what are the roots of the equation?

  • x = -5 or x = 3
  • x = 5 or x = 3
  • x = 5 or x = -3 (correct)
  • x = 3 or x = -5

What is the solution to the quadratic equation x^2 + 8x - 48 = 0?

  • x = -4 or x = 12
  • x = -16 or x = 14
  • x = 4 or x = -12 (correct)
  • x = 16 or x = -14

For which of the following equations would completing the square method be most appropriate?

<p>m^2 - 5m = -3 (A)</p> Signup and view all the answers

What is the intermediary step when solving x^2 + 8x - 48 = 0 using factorization?

<p>(x + 4)^2 - 64 = 0 (C)</p> Signup and view all the answers

What is a key advantage of converting a quadratic equation to a form of difference of two squares?

<p>Simplifies factorization of the equation (B)</p> Signup and view all the answers

In the first example given, what is the solution for x and y in the simultaneous equations 5x - 3y = 8 and 3x + y = 2?

<p>(x, y) = (1, -1) (D)</p> Signup and view all the answers

Which of the following is a quadratic equation?

<p>$x(x + 5) = 2$ (C)</p> Signup and view all the answers

What is the method used to solve the simultaneous equations in the second example given?

<p>Addition method (D)</p> Signup and view all the answers

Which of the following is NOT a quadratic equation?

<p>$5x^2 = 90$ (D)</p> Signup and view all the answers

When solving 3x + 2y = 29 and 5x - y = 18, what is the correct solution for x and y?

<p>(x, y) = (8, -3) (B)</p> Signup and view all the answers

If the roots of $x^2 + kx + k = 0$ are real and equal, what is the value of k?

<p>0 (A)</p> Signup and view all the answers

What is the result of multiplying equation (II) by 2 in the second example given?

<p>-10x + 2y = 36 (A)</p> Signup and view all the answers

For $2x^2 - 5x + 2 = 0$, what is the value of the discriminant?

<p>17 (A)</p> Signup and view all the answers

In the third example provided, what happens to the coefficients of x and y in the two equations?

<p>They are interchanged (D)</p> Signup and view all the answers

Which of the following quadratic equations has roots 3 and 5?

<p>$x^2 - 8x + 15 = 0$ (C)</p> Signup and view all the answers

What is the correct value of x when solving 15x + 17y = 21 and 17x + 15y = 11?

<p>x = -3 (C)</p> Signup and view all the answers

Out of the following equations, which one has the sum of its roots as -5?

<p>$x^2 - x - 6 = 0$ (D)</p> Signup and view all the answers

What is the formula used to solve a quadratic equation according to the text?

<p>$2a - b - \frac{b^2 - 4ac}{2a}$ (A)</p> Signup and view all the answers

Which expression represents one of the roots of a quadratic equation?

<p>$-\frac{b}{2a} - \sqrt{\frac{b^2-4ac}{2a}}$ (A)</p> Signup and view all the answers

From the given text, how are the values 'a' and 'b' related?

<p>a and b are unrelated in the context (B)</p> Signup and view all the answers

What happens to the roots of a quadratic equation if a root is represented by 'a'?

<p>Both roots become equal (D)</p> Signup and view all the answers

What is the relationship between 'a', 'b', and 'c' in the context of solving a quadratic equation?

<p>$ab = c$ (D)</p> Signup and view all the answers

How does the formula $2ax = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$ help in solving quadratic equations?

<p>It assists in finding the discriminant (C)</p> Signup and view all the answers

In an arithmetic progression, what is the nth term formula?

<p>$a_n = a + (n-1)d$ (C)</p> Signup and view all the answers

In an arithmetic progression, if the first term is 3 and the common difference is 5, what is the 6th term?

<p>28 (D)</p> Signup and view all the answers

What is the sum of the first 10 terms of an arithmetic progression with a first term of 2 and a common difference of 3?

<p>85 (C)</p> Signup and view all the answers

How many oranges would each student receive if Ranjana distributed them equally among 30 students?

<p>20 (D)</p> Signup and view all the answers

What is the area of Mr. Dinesh's agricultural farm if the pond's area is 100 square meters?

<p>400 square meters (A)</p> Signup and view all the answers

If a tank fills in 2 hours with both taps open, how long does it take for the smaller tap alone to fill the tank?

<p>8 hours (B)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Browser