Question

resolva as equações
x²-4=0
x²=9
49=x²
9x²=16
4x²-25=0
x²=2
x²+1=0
4x²=100
3x²=2
-2x²+5=0
2x²+11=0​

Answer 1

Resposta:

$x_1-2, x_2=2$

$x_1=-3, x_2=3$

$x_1=-7, x_2=7$

$x_1=-4/3, x_2=4/3$

$x_1=-2,5, x_2=2,5$

$x_1=-\sqrt{2}, x_2=\sqrt2$

x= erro

$x_1=-5, x_2=5$

$x_1=-\sqrt6/3, x_2=\sqrt6/3$

$x_1=-\sqrt10/2, x_2=\sqrt10/2$

x=erro

Explicação passo-a-passo:

x²-4=0

$x^2=4$

$x=+-2$

$x_1=-2$

$x_2=2$

x²=9

$x=+-3$

$x_1=-3$

$x_2=3$

49=x²

$x^2=49$

$x=+-7$

$x_1=-7$

$x_2=7$

9x²=16

$x^2=16/9$

$x=+-4/3$

$x_1=-4/3$

$x_2=4/3$

4x²-25=0

$4x^2=25$

$x^2=25/4$

$x=+-5/2$

$x_1=-5/2=-2,5$

$x_2=5/2=2,5$

x²=2

$x=+-\sqrt2$

$x_1=\sqrt2$

$x_2=\sqrt2$

x²+1=0

$x^2=-1$

4x²=100

$x^2=25$

$x=+-5$

$x_1=-5$

$x_2=5$

3x²=2

$x^2=2/3$

$x=+-\sqrt6/3$

$x_1=-\sqrt6/3$

$x_2=\sqrt6/3$

-2x²+5=0

$-2x^2=-5$

$x^2=5/2$

$x=+-\sqrt10/2$

$x_1=-\sqrt10/2$

$x_2=\sqrt10/2$

2x²+11=0