Question

resolva as equações:

Answer 1

a) 2x²=72
x²=36
x=√36
x=+-6

b) x²+10x²=99
11x²=99
x²=99/11
x=√9
x=+-3

c) 4x²=64
x²=64/4
x²=16
x=√16
x=+-4

d) x²=0,6/0,15
x²= 4
x=√4
x=+-2

Answer 2

a) 2x^2 - 72 = 0
2x^2 = 72
x^2 = 72/2
x = raiz 36
x = 6

b) x^2 = 99 - 10x^2
x^2 + 10x^2 = 99
11x^2 = 99
x^2 = 99/11
x = raiz 9
x = 3

c) -64 + 4x^2 = 0
4x^2 = 64
x^2= 64/4
x^2 = 16
x = raiz 16
x = 4

d) 0,15x^2 0,6
x^2 = 0,6/ 0,15
x = raiz 4
x = 2.

espero ter ajudado