Question

Efetue as operações indicadas

A)-7x3x+(-3x)
B)-(15x6):(3x²)
C)-2a²-3a+6)-(-4a²-5a+6)
D)-(5x-2)x(2x-1)
E)-(10x²+6x+4):(-2x)
F)-(2x²+6x+4):(x+1)

Answer 1

Olá!
A)
$-7x + 3x+(-3x) \\ - 7x + 3x - 3x \\ - 7x$
B)
$-(15 {x}^{6} ) \div (3 {x}^{2}) \\ - 15 {x}^{6} \div 3 {x}^{2} \\ - 5 {x}^{4}$

C)
$(-2 {a}^{2} -3a+6)-(-4 {a}^{2} -5a+6) \\ - 2 {a}^{2} -3a+6 + 4 {a}^{2} + 5a - 6 \\ 2 {a}^{2} + 2a$

D)
$-(5x-2) \times (2x-1) \\ (- 5x + 2) \times (2x - 1) \\ - 10 {x}^{2} + 5x + 4x - 2 \\ - 10 {x}^{2} + 9x - 2$
E)
$-(10 {x}^{2} +6x+4) \div (-2x) \\ ( - 10 {x}^{2} - 6x - 4) \div ( - 2x) \\ \frac{- 10 {x}^{2} - 6x - 4}{ - 2x} \\ \frac{ - 2(5{x}^{2} + 3x + 2)}{ - 2x} \\ \frac{5{x}^{2} + 3x + 2}{x}$
F)
$-(2 {x}^{2} +6x+4) \div (x+1) \\ ( - 2 {x}^{2} - 6x - 4) \div (x + 1) \\ \frac{- 2 {x}^{2} - 6x - 4}{x + 1} \\ \frac{- 2 \times ({x}^{2} + 3x + 2)}{x + 1} \\ \frac{- 2 \times ({x}^{2} + 2x + x + 2)}{x + 1} \\ \frac{- 2 \times (x \times (x + 2) + x + 2)}{x + 1} \\ \frac{- 2 \times (x + 2) \times (x + 1)}{x + 1} \\ - 2 \times(x + 2) \\ - 2x - 4$
Difícil algumas hehe!
Bons estudos!