Gr 11 Math Ch 2: Completing the Square

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Questions and Answers

What is the main purpose of completing the square method in solving quadratic equations?

  • To rewrite the equation in the form of a perfect square trinomial (correct)
  • To find the axis of symmetry
  • To find the vertex of the parabola
  • To graph the quadratic function

In the method of completing the square, what is the purpose of taking half the coefficient of the x term and squaring it?

  • To balance the equation
  • To add and subtract the value to the equation (correct)
  • To find the vertex of the parabola
  • To eliminate the x term

What is the formula for solving quadratic equations, given in the form ax^2 + bx + c = 0?

  • x = (-b ± √(b^2 - 4ac)) / a
  • x = (-b - √(b^2 - 4ac)) / 2a
  • x = (-b ± √(b^2 + 4ac)) / 2a
  • x = (-b ± √(b^2 - 4ac)) / 2a (correct)

What is the first step in solving a quadratic equation using the completing the square method?

<p>Write the equation in the standard form ax^2 + bx + c = 0 (C)</p> Signup and view all the answers

What is the advantage of using the quadratic formula to solve quadratic equations?

<p>It provides a quick and easy way to solve quadratic equations (C)</p> Signup and view all the answers

What is the result of completing the square of a quadratic equation?

<p>A quadratic equation in the form of a perfect square trinomial (B)</p> Signup and view all the answers

When solving a quadratic equation using the completing the square method, why do we add and subtract half the coefficient of the x term?

<p>To balance the equation and keep it equivalent (D)</p> Signup and view all the answers

What is the purpose of dividing the entire equation by a when solving a quadratic equation with a non-unitary leading coefficient?

<p>To make the coefficient of the x^2 term equal to 1 (A)</p> Signup and view all the answers

What is the result of completing the square of a quadratic equation in the form ax^2 + bx + c = 0?

<p>A perfect square trinomial (B)</p> Signup and view all the answers

Why is the quadratic formula useful for solving quadratic equations?

<p>It provides an exact solution for all quadratic equations (C)</p> Signup and view all the answers

When solving a quadratic equation using the completing the square method, what is the purpose of writing the left-hand side as a perfect square trinomial?

<p>To factor the equation and solve for x (A)</p> Signup and view all the answers

What is the final step in solving a quadratic equation using the completing the square method?

<p>Solving for x by taking square roots (A)</p> Signup and view all the answers

What is the significance of the coefficient of the x^2 term being equal to 1 in the completing the square method?

<p>It enables the rewriting of the equation into a perfect square trinomial. (C)</p> Signup and view all the answers

What is the underlying principle behind the addition and subtraction of half the coefficient of the x term in the completing the square method?

<p>Balancing the equation to keep it equivalent. (B)</p> Signup and view all the answers

Why is the quadratic formula useful for solving quadratic equations with non-unitary leading coefficients?

<p>It can be used to solve equations that cannot be factored. (C)</p> Signup and view all the answers

What is the relationship between the quadratic formula and the completing the square method?

<p>The quadratic formula is derived from the completing the square method. (D)</p> Signup and view all the answers

What is the purpose of writing the left-hand side of the equation as a perfect square trinomial in the completing the square method?

<p>To apply the square root property to solve for x. (D)</p> Signup and view all the answers

What is the main advantage of using the completing the square method over the quadratic formula?

<p>It helps to visualize the solution graphically. (D)</p> Signup and view all the answers

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