The formula for perimeter of a rectangle is:
P = 2(length + width)
Substituting the given expressions:
P = 2(3x^2 + 7x + 9 + 3x + 6)
Simplifying:
P = 6x^2 + 16x + 30
Therefore, the perimeter of the rectangle is 6x^2 + 16x + 30.
If the length of a rectangle in terms of x
is 3x^2 +7x +9
, and its width is 3x +6
, what is the perimeter of this rectangle?
1 answer