Question

09) Efetue os cálculos:
A) X. (2x - 3)
D) ( 4x - x - 2x) : x
B) (4a + d). 2d2
E) (5a + 15 a -10a%): 5a
C) (X + 2).(x + 6)​

Answer 1

Explicação passo-a-passo:

$a) \: x.(2x - 3) = x.2x - x.3 = 2 {x}^{2} - 3x \\ \\ b) \: (4x - x - 2x) \div x = x \div x = 1 \\ \\ c) \: (4a + d).2 {d}^{2} = 4a.2 {d}^{2} + d.2 {d}^{2} = 8a {d}^{2} + 2 {d}^{3}$

d) (5a + 15a - 15a) : 6a = 0 : 6a = 0

e) (x + 2).(x + 6) = x.x + x.6 + 2.x + 2.6 = x^2 + 6x + 2x + 12 = x^2 + 8x + 12