SOLUTION: The length of a table is 3 m greater than the width. The area is 70 m^2. Find the dimensions of the table

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Question 473123: The length of a table is 3 m greater than the width. The area is 70 m^2. Find the dimensions of the table
Answer by sofiyac(983) About Me  (Show Source):
You can put this solution on YOUR website!
width is x
length is x+3
area=length*width
70=x(x+3)
70=x^2+3x
0=x^2+3x-70
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x+=+%28-3+%2B-+sqrt%28+9%2B280+%29%29%2F%282%29+
x+=+%28-3+%2B-+sqrt%28+289+%29%29%2F2+
x+=+%28-3+%2B-+17%29%2F2+
measure can't be negative for length and width so we have to go with + option
x+=+%28-3+%2B+17%29%2F2+
x+=+14%2F2+
x+=+7+
so width is 7, then length is 7+3=10