Question

resolva as equações:

a- 9x²=16
b- 4x²=100
c- -2x²=128=0

Answer 1

a)9x²=16
    x²=16/9
   x=√16/9
x=+ -4/3
b)4x²=100
x²=100/4
x=√25

x=+ -5
c)-2x²=128(-1)
   2x²=-128
 x²=-128/2
x²=-64
x=√-64Ф