Question

\(x^2=1600\)

giúp mik

 

Answer 1

`x^2=1600`
`<=>x=+-40`

Answer 2

Ta có: \(x^2=1600\)

nên \(x\in\left\{40;-40\right\}\)

Vậy: \(x\in\left\{40;-40\right\}\)

Answer 3

x² = √1600 = 40

Answer 4

$x^2 = 1600$ 

$ x E {40;-40}$

Answer 5

\(x^2\)=\(40^2\)

\(\Rightarrow\)x=40

Answer 6

40

Answer 7

x.x=1600

x=40, (-40)

Answer 8

40mũ2

Answer 9

x²=1600

=>=40²

^=>x=40

Answer 10

x²=1600

⇒40²=1600 hoặc (-40)²=1600

⇒x=40 hoặc x=-40