Asked by Andre
The length of a rectangle can be represented by the expression x + 6. If the area of the rectangle is 2x ^ 2 + 8x - 24 , what is the expression for the width of the rectangle?
Answers
Answered by
mathhelper
area = length * width
2x^2 + 8x - 24 = (x+6)(......)
you know the second bracket has to start with 2x, so ...
= (x + 6)(2x .....) , to get the -24 our second bracket must end with -4
= (x + 6)(2x - 4)
so the width is 2x-4
check by expanding my factors.
2x^2 + 8x - 24 = (x+6)(......)
you know the second bracket has to start with 2x, so ...
= (x + 6)(2x .....) , to get the -24 our second bracket must end with -4
= (x + 6)(2x - 4)
so the width is 2x-4
check by expanding my factors.
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