given:
one side= (2x+4) cm
perimeter= (6x+4) cm
to find:
the area of the rectangle in terms of x.
solution:
P=2(l+b)
We have some variables to sub in so it’s now
6x+4=2(2x+4+b)
3x+2=2x+4+b
x−2=b
And now we have the values for the sides
A=lb
And we know what ll and bb are, so we can just sub those values in:
A=(2x+4)(x−2)
A=2(x+2)(x−2)
[tex]a = (2 {x}^{2} - 4)[/tex]
[tex]a = {2x}^{2} - 8[/tex]
