Question

formulas of factorization​

Answer 1

Answer:

we factorise the quadratic, the equation can be written as (x − 5)(x + 3) = 0. ... For example, the quadratic x2 − 2x − 15 has A = 1, B = −2 and C = −15. So according to the formula the solutions of the equation x2 − 2x − 15 = 0 are: as before.

Answer 2

Answer:

$= {x}^{2} + (a + b)x + ab$