Question

Efetue,reduzindo os termos semelhantes:
(x+5).(x+1)-2.(x-3)+(x+8)²=

Answer 1

(x+5).(x+1) -2.(x-3) +(x+8)²

x.x+x.1+5.x+5.1 -2.x -2.(-3) +x²+2.x.8+8²

x²+x+5x+5 - 2x+6 + x²+16x+64

x²+6x+5 -2x+6 + x²+16x+64

x²+x² + 6x-2x+16x + 5+6+64

2x² + 20x + 75 ✓