Question

please help

Answer 1

After being rearranged and simplified, which of the following equations could be solved using the quadratic formula?
a; 2x^2-6x-7=2x^2
b; 5x^3-3x+10=2x^2
c; 2x^2-3x+10=2x+21
d; 5x^2+2x-4=2x^2

Answer 2

well start by rewriting the equations with all terms on the left hand side

for example...

d. subtract 2x^2 from both sides

3x^2 + 2x - 4 = 0

if you do that you'll find you can eliminate 2 equations... leaving the 2 solutions.

and the quadratic formula only works with equations where the highest power is 2

hope it helps