The area of a rectangle is represented by the polynomial x^2+3x-6x-18. What are the length, width, and area of the rectangle if x=12?

Length = 15

Width = 6

Area = 90

Step-by-step explanation:

Area of the rectangle =

Lets factorise the polynomial

We know that Area = Length × Width

Let the length be (x + 3) & width be (x - 6)

Its given in the question that x = 12. So putting the value of x gives ,

Length =

Width =

Area = Length × Width = 15 × 6 = 90

a

step-by-step explanation: