Question

PLEASE HELP FAST

Select all of the following that are quadratic equations.

5 x 2+ 15 x = 0
6 x - 1 = 4 x + 7
x 2 - 4 x = 4 x + 7
2 x - 1 = 0
3 x 2 + 5 x - 7 = 0
x 3 - 2 x 2 + 1 = 0

Answer 1

x 2-4x=4x+7, 3x2+5 x -7=0 and x 3-2x2+1

Explanation:

A quadratic equation is any equation containing one term in which the unknown(x) is squared and no term in which it is raised to a higher power. So there is your answer to you question.