Question

Solutia ecuatiei (x+2)^2+2(x+5)(x-5)=3(x+1)^2+1

Answer 1

(x+2)²+2*(x+5)(x-5)=3(x+1)²+1
x²+2x+4+2*(x²-25)=3*(x²+2x+1)+1
x²+2x+4+2x²-50=3x²+6x+3+1
3x²+2x-46=3x²+6x+4
3x²-3x²+2x-6x=46+4
-4x=50
x=50 :(-4)
x=12.5