Question

What is the value of y so that the equation is true?

y^2 = −49


a.7


b.-7


c.All real numbers.


d.No real numbers will make the equation true.

Answer 1

d

Explanation:

y² = - 49 ( take the square root of both sides )

y = ±
`√(-49)`

The
`√(-49)` is complex, then

no real values will make the equation true

Answer 2

D

Explanation:

it cant be A or B becuase +7 × +7 = +49, -7 × -7 = +49. not all numbers will be squared and = -49

so it must be D