Question

Factorize 4x^2-9y^2+20x+25

Answer 1

Answer:

Step-by-step explanation:

=4x^2+20x+25-9y^2

=(2x)^2+2.2x.5+5^2-9y^2

=(2x+5)^2-(3y)^2                          

=(2x+5+3y)(2x+5-3y)                    (Reason: a^2-b^2=(a+b)(a-b))