Question

(+5x) . (-4x²)=

(-2x) . (+3x)=

Answer 1

Resposta:

(+5x) . (-4x²)= $-20x^3$

(-2x) . (+3x)= $-6x^2$

Explicação passo-a-passo:

(+5x) . (-4x²)=

$=5x\cdot \:-4x^2\\=5x^{1+2}\cdot \:-4\\=5x^3\cdot \:-4\\=-20x^3$

(-2x) . (+3x)=

$=-2x\cdot \:3x\\=-6xx\\\\=-6x^{1+1}\\=-6x^2$