Question

Using the quadratic formula to solve 7x2 -x = 7, what are the values of x?

Answer 1

x=-7

Explanation:

7x2-x=7

7x2=14.

14-x=7

When you finished the last step, you will subtract 14 to both sides.

14-x=7

14-14-x=7-14

this will cancel out the 14 on the left.

And will leave you with:

-x=7-14

7-14 is -7.

and this will get you to

-x=-7

To finish this off, you have to turn the negative x/variable, into a positive x/variable.

So, you will divide both sides of the equation by the same term.

-x = -7

into

`(-x)/(1) =(-7)/(1)`

and it will be -7.

I hope this helps :)