Question

calcule as multiplicacoes e divisoes​

A) 2a . 3a . 2a²=
B) 45ab . 2ab=
C) 30x⁴ ÷ 2x=
D) 30 x² ÷ 2x=​

Answer 1

Oie, Td Bom?!

A)

$= 2a \: . \: 3a \: . \: 2a {}^{2}$

$= (2 \: . \: 3 \: . \: 2)a {}^{1 + 1 + 2}$

$= 12a {}^{4}$

B)

$= 45ab \: . \: 2ab$

$= (45 \: . \: 2)a {}^{1 + 1} b {}^{1 + 1}$

$= 90a {}^{2} b {}^{2}$

C)

$= \frac{30x {}^{4} }{2x}$

$= \frac{15x {}^{4} }{x}$

$= 15x {}^{4 - 1}$

$= 15x {}^{3}$

D)

$= \frac{30 x{}^{2} }{2x}$

$= \frac{15x {}^{2} }{x}$

$= 15x {}^{2 - 1}$

$= 15x {}^{1}$

$= 15x$

Att. Makaveli1996

Answer 2

• Letra A

$\sf 2a\cdot 3a\cdot 2 {a}^{2}$

$\sf = 6 {a}^{2} \cdot 2 {a}^{2}$

$\red{\boxed{\sf = 12 {a}^{4} }}$

• Letra B

$\sf 45ab\cdot 2ab$

$\red{\boxed{\sf = 90 {a}^{2} {b}^{2}} }$

• Letra C

$\sf \dfrac{30 {x}^{4} }{2x}$

$\red{\boxed{\sf = 15 {x}^{3} }}$

• Letra D

$\sf \dfrac{30 {x}^{2} }{2x}$

$\red{\boxed{ \sf = 15x}}$