Question

me ajudem por favor, pra agora​

Answer 1

Resposta:

a)

$10x^{2}$

b)

$- 15a^{2} b$

c)

$12y^{3}$

d)

$- 8x^{2} y^{2}$

Explicação passo-a-passo:

a)

$2x \times 5x = 2 \times 5 \times x \times x = 10 \times x^{2} = 10 {x}^{2}$

b)

$- 3a \times 5ab = - 3 \times 5 \times a \times ab = - 15 \times a \times a \times b = - 15 \times {a}^{2} \times b = - 15 {a}^{2} b$

c)

$4y \times 3 {y}^{2} = 4 \times 3 \times y \times {y}^{2} = 12 \times {y}^{3} = 12 \times y^{3}$

d)

$2xy \times ( - 4xy) = 2 \times (- 4) \times xy \times xy = - 8 \times x \times x \times y \times y = - 12 \times {x}^{2} \times {y}^{2} = - 12 {x}^{2} {y}^{2}$

Espero que entendas!