Question

Find the zeros and verify the relation between zeros and coefficients of
x2 - 9​

Answer 1

$f(x) = {x}^{2} - 9 \\ = (x + 3)(x - 3) = 0 \\ x = 3 \: and \: - 3 \\ \\ from \: the \: eqn \: \\ sum \: of \: roots = - \frac{0}{1} = 0 \\ verification \: 3 - 3 = 0 \\ \\ product \: = \frac{ - 9}{1} \\ verification \: = 3 \times ( - 3) = - 9$
hence, verified