Question

Quadratic polynomials factories
a^2-5ab-36b^2​

Answer 1

Step-by-step explanation:

$a {}^{2} - 5ab - 36b {}^{2}$

$a {}^{2} - 9ab + 4ab - 36b {}^{2} \\ = a(a - 9b) + 4b(a - 9b) \\ = (a + 4b)(a - 9b) \\ = a = - 4b \: or \: 9b$