Question

6) Resolva as equações incompletas em b (b=0)
A) x²-36=0
B) 2x²-18=0
C)3x²+1=197-x²
D) x(2x+3) =3x+50

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Answer 1

Resposta:

a) x²=36

x=√36

x=6

b)2x²=18

x²=18÷2

x²=9

x=√9

x=3

c)3x²+x²=197-1

4x²=196

x²=196÷4

x²=49

x=√49

x=7

d)2x²+3x=3x+50

2x²3x-3x=50

2x²=50

x²=50÷2

x²=25

x=√25

x=5