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3 years ago

Solve for x. 3x^2−10=−5 (choices in photo)

Mathematics

1 answer:

stiks02 [169]3 years ago

3 0

The correct answer is the second one: ±√15/3

Explan ation:

You have the quadratic equation <span>3x^2−10=−5. Then you must clear the variable "x" as below:
</span><span>
3x^2−10=−5</span>
<span> 3x^2=−5+10
</span><span>3x^2=5
</span><span>x^2=5/3
x=</span>±√(5/3)

When you multipy the numerator and the denominator by 3 for simplify the result, you obtain:

x=±√(5x3/3x3)
x=±√(15/3²)

When you simplify, you have:

x=±√15/3

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