Question

Efetue as multiplicações
a)(+5x).(-4x²)=
b)(-6x).(+3x²)=
C)(-2y).(5y)=

Answer 1

Resposta:

OLÁ

A)

$( + 5x) \times ( - 4 {x}^{2} ) \\ - (5 \times 4) \times (x \times {x}^{2} )\\ - 20 \times {x}^{1 + 2} \\ - 20 \times {x}^{3} \\ \boxed{ \blue{ - 20 {x}^{3}}}$

B)

$( - 6x) \times ( + 3 {x}^{2} ) \\ ( - 6 \times 3) \times (x \times {x}^{2} ) \\ - 18 \times ( {x}^{1 + 2} ) \\ - 18 \times {x}^{3} \\ \boxed{ \blue{ - 18 {x}^{3} }}$

C)

$( - 2y) \times (5y) \\ ( - 2 \times 5) \times (y \times y) \\ - 10 \times ( {y}^{1 + 1} ) \\ - 10 \times {y}^{2} \\ \boxed{ \blue{ - 10 {y}^{2} }}$

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espero ter ajudado

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