Question

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Answer 1

Explicação passo-a-passo:

b) x ( x - 2) = 0

x= 0

x-2 =0

x =0 +2

x = 2

c) x ( x - 8) = 0

x = 0

x - 8 = 0

x = 0 + 8

x = 8

d) x (3x - 15) = 0

x = 0

3x - 15 = 0

3x = 0 + 15

x = 15/3

x = 5

e) x ( 3x - 21) = 0

x=0

3x - 21 = 0

3x = 0 + 21

x = 21/3

x= 7

f) x (x + 12) = 0

x = 0

x+ 12 = 0

x = - 12