Question

please help me to solve this question (2x+4)(2x-5)​

Answer 1

Step-by-step explanation:

(2x+4)(2x-5)

Here,

(x+a)(x+b) formula will be used.

This is, x²+(a+b)x+ab

here, x = 2x

a = 4

b = (-5)

So, (2x+4)(2x-5) = (2x) ² + [4+(-5)]x + 4*(-5)

= 4x² - x - 20.