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Math Help - college algebra

  1. #1
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    college algebra

    6x(to the power of 2) + 42x=0
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  2. #2
    o_O
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    Factor out a 6x.

    \begin{aligned} 6x^2 + 42x & = 0 \\ 6x(x + 7) & = 0 \end{aligned}

    Now note that if two numbers multiplied together equals to 0, then either one or both of the numbers are 0. So let's set both factors (6x and the x + 7) equal to 0 to see what we get.

    6x = 0 \qquad x + 7 = 0

    Can you carry on from here?
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