rebeccaal rebeccaal

10-11-2016
Mathematics

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a rectangular room has an area of 425 square feet. one dimension is 8 feet more than the other. find both dimensions of the room.

Respuesta :

10-11-2016

Area is calculated using length time width.

If we let the shorter dimension equal x, we can write the equation as x(x+8)=425

Expand and rearrange to get a quadratic, then solve

x^2+8x-425=0

(x+25)(x-17)=0

x=-25 or x=17

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