Question

ache as raizes das equaçoes incompletas a baixo

a)3x²-9x=0

b)x²-16=0

c)2x²-10x=0

d)-x-36-0

Answer 1

a)3x²-9x=0

x(3x-9)=0

x=0

3x-9=0

3x=9

x=9/3

x=3

b)x²-16=0

x²=16

x=+-✓16

x=+-4

c)2x²-10x=0

x(2x-10)=0

x=0

2x-10=0

2x=10

x=10/2

x=5

d)x²-36=0

x²=36

x=+-✓36

x=+-6