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x+y= 15 xy=56 y=15-x You take all of the and make it into x(15-x)=56 then you get -x(x)+15x=56 -x(x)+15x-56=0 Then we break it up (-x+7)(x-8)=0 Then we can solve for our two numbers which are -7 and -8. I think i am missing something though. Hope the rest of your homework goes better. You can pull the negative out of the equation to make it easier.

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Q: If the sum of two numbers is -15 and their product is 56 then these two numbers are roots of what equations?
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