Question

Genteeeee
Me ajudem tentem responder a 18 e a 20

Answer 1

$a) \\ (2x + 8).(4x + 1) \\ {8x}^{2} + 2x + 32x + 8 \\ {8x}^{2} + 34x + 8 \\ \\ b) \\ (2x - 2).(x + 4) \\ {2x}^{2} + 8x - 2x - 8 \\ {2x}^{2} + 6x - 8 \\ \\ c) \\ (x - y).( {x}^{2} - xy + {y}^{2} ) \\ {x}^{3} - {x}^{2} y + x {y}^{2} - {x}^{2} y + x {y}^{2} - {y}^{3} \\ {x}^{3} - 2 {x}^{2} y + 2x {y}^{2} - {y}^{3}$