Question

3(x+4)²-2(x-1)(x+5)=3(2x+3)+(x+1)²

Answer 1

3(x+4)²-2(x-1)(x+5)=3(2x+3)+(x+1)²
3(x²+8x+16)-2(x²+5x-x-5)=6x+9+x²+2x+1
3x²+24x+48-2x²-8x+10=8x+x²+10
x²-x²+16x-8x+58=10
8x=10-58
x=-48:8
x=-6