How do you get rid of x^2 in a solve for x equation?

Question

How do you get rid of x² in a solve for x equation?

EX: 7x -2x² = -15^

Answer 1

First factor out x

x(7-2x)=-15

Solve for integers of multiples that it could be:

1,3,5,15

Then figure out which statements are true:

5=7-2x =

-2, x=1 not true

-5=7-2x =6 not true

3= 7-2x, x= 2 not true

-3=7-2x

, x=5 this rings true for the equation so far so you can eliminate integers 1 and 15.

If you set -3= 7-2x,. You will find x to be 5, and it is +5

So the other component would have to be a -3.

with -3 and +5, this statement rings true.

Solving for the roots, this will also make this statement true:

-3*5= -15

Your roots to the parabola or quadratic function are x:-3,5

Or in other words when y is equal to 0 on the graph, x will be -3 on one end and 5 at the other end.

Answer 2