Question

(2x+5)^2 - (2x-3)*(2x+1)=4

Answer 1

(2x+5)²-(2x-3)(2x+1)=4
4x²+20x+25-4x²-2x+6x+3=4
24x=-24
x=-1

Answer 2

(2x+5)^2 - (2x-3)*(2x+1)=4
4x^2 + 20x  +25 - 4x^2 + 4x  +3 - 4 = 0
 24x + 24 = 0
x=-1