The equation A = x(x - 2) describes the area, A, of a rectangular flower garden, where x is the width in feet. Medal What would be the width in feet of the flower garden if the area is 15 square feet?
set up an equation
Area = Length x Width
x = width so x-2 = Length
Total area = 15 15 = x(x-2)
I would put that into a form of Ax^2 + Bx + C = 0 and try to factor it
x^2 - 2x - 15 = 0
(x+3)(x-5) = 0 so (x - 5) = 0 or (x+3) = 0
So what will be the answer out of these answers.. A.)3 B.)6 C:)5 D.)2
So if the Width is X, what is the answer
What are the solutions to x - 5 = 0 or x + 3 = 0
x is a measure of width, a length, so it should be the positive of the two values
Would it be 5?
yes
Try that in your original given equation of Area = x(x-2) For x = 5 and see if you get 15, as a check
5(5-2) = 5*3 = 15 good
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