Question

Simplifiqur as expressões

A)(x+1).(x+2)-2(x+3)²+(x+2).(x+3)

Answer 1

$(x + 1)(x + 2) - 2 {(x + 3)}^{2} + (x + 2)(x + 3) \\ {x}^{2} + 2x + x + 2 - 2( x {}^{2} + 6x + 9) + {x}^{2} + 3x + 2x + 6 \\ 2x {}^{2} + 8x + 8 - ( {2x}^{2} + 12x + 18) \\ {2x}^{2} + 8x + 8 - {2x}^{2} - 12x - 18 \\ - 4x-10$