Area = Length * Width
If W = x, then L = x+3
40 = x^2 + 3x
x^2 + 3x - 40 = 0
(x+8)(x-5) = 0
For each possible value of x, find x+3.
A heating duct has a rectangular cross section whose area is 40(inches squared).
If it is 3in longer than it is wide then what is its length and width. i need both equation and answer
2 answers
x cannot be negative, so only one of the two possible number for x is correct.
1 answer