SOLUTION: X * y=356 but y is +10 more than x

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Question 13303: X * y=356
but y is +10 more than x
Answer by bam878s(77) About Me  (Show Source):
You can put this solution on YOUR website!
Since Y is 10 more than x we have y=10+x.
Subbing this into the equation yields:
x(10+x)=356
or 10x+x^2=356.
Rearranging, we have
x^2+10x-356=0
Now, we solve this using the quadratic formula
x=%28-10%2B-sqrt%2810%5E2-4%2A1%2A%28-356%29%29%29%2F%282%2A1%29
This yields x=14.5192213 or x=-24.5192213.