Asked by Sydney

Given that the area of the rectangle is 2x^2 + 9x - 5 , determine the length of the rectangle.
Answered by Reiny
not enough information.
Answered by Sydney
Sorry the width is x+5, I think I combine the like terms, is that right?
Answered by Reiny
no
Area = length x width
so
2x^2 + 9x - 5 = (x+5)(.......)

you can do either a division, or just use common sense
where does the 2x^2 come from?
Wouldn't it be the multiplication of the first terms in the binomials?
where does the - 5 come from?
wouldn't it be the multiplication of the last numbers of the 2 binomials?
Answered by Sydney
x^2-1

would it be this?
Answered by bobpursley
no.

what multiplied by (x+5) gives (2x^2+9x+5)?

Think. What multiplied by x gives 2x^2?
then what multliplied by 5 gives 5?

(??? +???)
Answered by Sydney
2x-1

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