Question

resolva as equacoes :

a)2x²-72 =0
b)x²=99-10x²
c)-64+4x²=0
d)0,15x²=0,6

Answer 1

a) 2x²-72 =0
x^2= 72/2
x=✓36
x= 6

b)11x^2= 99
x^2= 9
x=✓9
x= 3

c) x^2= 64/4
x=✓16
x= 4

d) x^2= 0,6/0,15
x=✓4
x=2

Answer 2

a)
2x²-72=0
2x²=72
x²=72/2
x=√36
x=+-6

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

c)
-64+4x²=0
4x²=64
x²=64/4
x²=√16
x=+-4

d)
0,15x²=0,6
x²=0,6/0,15
x²=4
x=√4
x=+-2