Class 9 CBSE Board Maths Quiz

Completing the square

Factoring

Using the quadratic formula

All of the above (correct)

$A = \sqrt{s(s-a)(s-b)(s-c)}$ (correct)

$A = \pi r^2$

$A = lw$

$A = \frac{1},{2}bh$

$y = bx + m$

$y = b - mx$

$y = mx + b$ (correct)

$y = mx - b$