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Algebra question please help me

Algebra question please help me-example-1

1 Answer

2 votes

None of them is correct, When you do


x^(2) =-4

It become this:


√(x)²
=√(-4)

you cancel the ² with
\sqrt{} or square root. However this cause the problem since -4 is negative and there isn't just one answer because of square root.

i =
√(-1)


x= i√(4) or
x=-i√(4)

Square root the 4, the final answer is


x=2i or
x=-2i




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