Question

Which statement is always true?

1.A negative exponent cannot be part of an expression's numerator.
2.A negative base raised to the power of 2 has a negative value.
3.A negative base raised to the power of 2 has a positive value.
4.Any number to the first power is zero.

Answer 1

3. A negative base raised to the power of 2 has a positive value.

Example ( -A ) ^ 2 = -A x -A = A^2

This is always true because, - x - = +

Answer 2

3, because a negative number multiplied by another negative number (in this case, itself) will always be a positive number.