if the area of the rectangle is 24in^2, find the demensions.

Question

anonymous · Answer

it has x on the side and x+5 on top if that helps.

solomonzelman · Answer

Oh, then it makes sense.

solomonzelman · Answer

$$A= base \times hieght$$ so$$A= (x+5) \times x$$ we know that the area is equal to 24, so$$24= (x+5)x$$
can you solve for x?

anonymous · Answer

that would become x^2 + 5=24
then I would subtract 5 from 24 
making it x^2= 19 right?

anonymous · Answer

oh wait the 5 would become 5x wouldn't it?

solomonzelman · Answer

Not exactly, it is x^2+5x=24

anonymous · Answer

now i'm lost

anonymous · Answer

would it be 3in x 8in?

cggurumanjunath · Answer

x^2 + 5x=24
x^2-5x-24=0

cggurumanjunath · Answer

@becca_baby

solomonzelman · Answer

@becca_baby, you got it!

cggurumanjunath · Answer

can u solve for x ?

cggurumanjunath · Answer

do u know how to factorise x^2-5x-24 @becca_baby ?

solomonzelman · Answer

Which methods do you know?
Quadratic formula
Factoring
Completing the square

(Sorry, CGGURUMANJUNATH, I am just reasking your question in a better way.)

anonymous · Answer

i understand the quadratic formula and factoring. I am doing math online and my teacher hasn't been of much help

cggurumanjunath · Answer

i was just continuing from where u had left previously @SolomonZelman

solomonzelman · Answer

Yeah, I understand, I just got tagged 5 times, so please take over, @CGGURUMANJUNATH.

cggurumanjunath · Answer

no let us continue together @SolomonZelman

anonymous · Answer

can I have help with polynomials possibly?

cggurumanjunath · Answer

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