_____11. All of the following trinomials are factorable, except one. Which is it?
A. x²+2x−15
B. x² - 2x−15
C. x²+14x−15
D. x² - 8x−15
_____12. One of the factors of x² + 4x -21 is x - 3. What is the other factor?
A. x – 7
B. x + 7
C. x – 3
D. x + 3
_____13. If one factor of 2x² + 5x – 3 is 2x – 1, what is the other factor?
A. 2x – 1
B. 2x + 1
C. x + 3
D. x - 3
_____14. Which of the following trinomials has factors (2a−b)and(a−2b)?
A. 2a²+5ab-2b²
B. 2a²-5ab+2b²
C. 2a²-5ab-2b²
D. 2a²+5ab+2b²
_____15. A rectangular garden has an area of 6x2+13x +6 square meters. If the length is represented by 3x+2, find a binomial that represents the width.
A. 2x+1
B. 2x−1
C. 2x+3
D. 2x−3​