Polynomials TestAnswers

1. Find the product of these polynomials.(2 marks each)

(x-1)(x+3)

(x2 - x - 1)(x + 7)

-x(x3 + x + 3)

2. For the triangle with a base of b = x +1 and a height of 3x, find an expression for the area of the triangle in terms of x. The formula for area of a triangle is A = 1/2bh. (3 marks)

h = 3x

b = x + 1

3. Divide (x2 + 10x + 21)(x + 3)

4. If there is a rectangle with an area of x2 - 3x + 2 units squared, and the length is x - 1, find the width of the rectangle. (2 marks)

3a + 12b + 3c

Factor

Factor

9x2y + 6xy

Factor

4x2 - 25

Factor

2x2 + 5x + 3

Factor

4x2 + 20x + 25