Question

Resolva: a)3ײ- 48 =0 b)2ײ + 6x = 0 c) 7ײ = 14× d)4ײ - 36= 0

Answer 1

a)

3x²-48=0

3x²=48

x²=16

x= -4 ou +4

b)

2x²+6x=0

x(2x+6)=0

x=0

2x=-6

x=-3

C)

7x²=14x

7x²-14x=0

x(7x-14)=0

x=0 x=14/7 = 2

d)

4x²-36=0

4x²=36

x²=9

x= -3 ou +3