Question

esolva as equações incompletas:
a) x²-36=0
b)x²-81=0
c)2x²=128
d)3x²-20=280
e)x²-2x=0
f)x²+6x=0
g)2x²-12x=0

Answer 1

a) x²  - 36  =  0
x²  = 36
x = raiz36
x = 6

b) x²-81=0
x²=81
x=raiz81
x=9

c) 2x²=128
x²= 64
x=raiz64
x=8

d)3x²-20=280
3x²=300
x²=300/3
x²=100
x=raiz100
x=10

e)  x²-2x=0
x(x-2)=o
x'=o x''=2

f) x²+6x=0
x(x+6)=0
x'=0 x''=-6

g)2x²-12x=0
2x(x-6)=0
x'=0 x''=6