Question

resolva as equações

a) x²=49
b)x²-25=0
c)2x²-72=0
d)x²=99-10x²
e)-64+4x=0
f)0,15x²=0,6

Answer 1

a)x²=49
x=√49
x=7
b)x²-25=0
x²=25
x=√25
x=5
c)2x²-72=0
2x²=72
x²=72/2
x²=36
x=√36
x=6
d)x²=99-10x²
x²+10x²=99
11x²=99
x²=99/11
x²=9
x=√9
x=3
e)-64+4x=0
4x=64
x=64/4
x=16
f)0,15x²=0,6
x²=0,6/0,15
x²=4
x=√4
x=2

Espero ter ajudado! :)