Question

B) 2x ao quadrado+x(x+2)-(x+3)(x-3)=2(x+1) ao quadrado
Me ajudemm, pfv

Answer 1

$2x^{2}+x\cdot(x+2)-(x+3)\cdot(x-3)=2\cdot(x+1)^{2} \\ \\2x^{2}+x^{2}+2x-(x^{2}-9)=2\cdot(x^{2}+2x+1) \\ \\2x^{2}+x^{2}+2x-x^{2}+9=2x^{2}+4x+2 \\ \\2x^{2}+x^{2}-x^{2}-2x^{2}+2x-4x+9-2=0 \\ \\-2x+7=0 \\ \\-2x=-7 \\ \\x= \frac{-7}{-2}\\ \\x= \frac{7}{2}\\ \\S=\Big\{{\frac{7}{2}\Big\}$