Algebra

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Hi,

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 -

    You 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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