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weqwewe [10]
3 years ago
14

Solve: x^2 = 81 x^2 = -9 x^2 = 20 3x^2 = 125

Mathematics
1 answer:
sergeinik [125]3 years ago
3 0
<span>x^2 = 81
x = </span>±√81
x = ±9<span>

x^2 = -9 no solutions 

x^2 = 20
x = </span>±√20
x = <span>±2</span>√5<span>

</span>3x^2 = 125 \\ &#10;x^2 =   \frac{125}{3} \\ x=б \sqrt{ \frac{125}{3} }<span>
</span>
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