Question

Select all of the following that are quadratic equations.

x^2-2x=4x+1
x^3-6x^2+8=0
5x-3=0
2x^2+12x=0
5x-1=3x+8
9x^2+6x-3=0

Answer 1

all of the answers with an exponent of 2, so it would be 1, 4, and 6

Answer 2

Any equation that has a term with exponent greater than 1 is a quadratic equation.
Therefore the 1st, 2nd, 4th and 6th equations are quadratic equations