Question 183734
Area of a parallelogram = base * height

A(x) = (3x+2) * (2x+3)
expand the factors by multiplication

A(x) = 6 x^2 + 4x + 9x + 6
adding the coefficients of x terms

A(x) = 6 x^2 + 13x + 6 This is the trinomial that represents the area of the parallelogram.

A(3) is obtained by substituting x=3 in the trinomial.

A(3) = 6 * 3*3 + 13*3 +6 = 6*9 + 39 +6 = 54 + 39 +6 = 99.