Question

Factorise (2x+5)^2 + 4(2x+5)

Answer 1

Answer:

x= -9/2 & -5/2

Step-by-step explanation:

or, 4x^2+2×2x×5+5^2 + 8x+20=0

or, 4x^2+20x+25 + 8x+20=0

or, 4x^2+28x+45=0

or, 4x^2+10x+18x+45=0

or, 2x(2x+5)+9(2x+5)=0

or, (2x+9)(2x+5)=0

or, 2x= -9 & 2x= -5

or, x= -9/2 & x= -5/2