Question

resolva as equacoes encontrando o conjunto solucao

Answer 1

a) 9x²-144=0
9x²=144
x²=16
x=4

d)-2x²+128=0
-2x²=-128 (-1)
2x²=128
x²=64
x=8

g)3x²+27=0
3x²=-27
x²=-9
x=-3

j) -625+x²=0
x²=625
x=25

Answer 2

9x² - 144 = 0       9x² = 144      x² = 144/9     x = √144/9     x = 12/3   x = 4

.
- 2x² + 128 = 0   -2x² = - 128    x² = -128/ -2    x² = 64     x = √64     x = 8

.
3x² + 27 = 0    3x² = - 27    x² = -27/3     x² = -9    x = √-9

.
- 625 + x² = 0    x² = 625     x = √625    x = 25