Which of the following quadratic functions would hAve no solution?

Question

A) y=-4x^2+8

 

B) y=4x^2-8

 

C) y=8-4x^2

 

D) y=4x^2+8

Answer 1

The square of any number is always positive. The one that does not have a solution is the one that requires a square that is negative.

 

Look at D.

 

0 = 4x² + 8

-8 = 4x²

-2 = x², not possible. This is the one.