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The length of a rectangle is 10cm and the width is 6sm. Each side is enlarged by x cm. The enclosed area of the new rectangle is 480 cm. Whats the new dimensions of the ractangle, and how?
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(10+x)(6+x)=480
60 + 16x +x^2=480
I got -30 by 14 which is impossible
x^2+16x=420
i used the quadratic formula
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x^2+16x-420 (x-14)(x+30)=0 x=14 or -30 it can be negative so x=14
and then 10+14 and 6+14
Yes
Thanks!
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