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March 1, 2015

March 1, 2015

Posted by **Trevor** on Wednesday, May 12, 2010 at 2:14pm.

I have had to factorise the equation

x^2 + x - 30 = 0, which I think I have worked the answer out as x =-6, x =5?

I now need to explain how I can use this answer to solve the equation

4x^2 +4x -120 =0

Any advice?

- Algebra -
**selina**, Wednesday, May 12, 2010 at 2:45pmYou would take your answers and plug them in to the equation.

4(-6^2)+4(-6)-120=0

and

4(5^2)+4(5)-120=0

then work out the problems and if you are correct 0=0

Hope this helped

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