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

Question

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

Answer 1

4x-6-(4x^2-25)=-2
4x-6-4x^2+25=-2
-4x^2+4x=-2+6-25
-4x^2+4x=-21
-4x^2+4x+21=0
D1=2^2-(-4)*21=4+84=88
√D1=√88
x1=-4+√88/-4
x2=-4-√88/-4