13. The following is the step by step solution in finding the product of (-2x + 7)^2What solution line made it incorrect?
(1) (-2x + 7) (-2x + 7)
(2) (-2x)(-2x) + (-2x) (7) + (7)(-2x) + (7)(7)
(3) 4x^2 + (-14x) + (-14x) + 49
(4) 4x^2 + 28x + 49
A. Step 1
B. Step 2
C. Step 3
D. Step 4
14. The area of a triangular structure is 3x2 + 6x - 9 square meters. Find the height of the structure if its base is x + 3 meters.
A. x + 2
C. x + 1
B. x - 2
D. X - 1
15. Which of the following are the possible factors of x2 - 2x - 35?
A. (x + 5)(x-7)
C. (x - 2)(x - 35)
B. (x - 5)(x + 7)
D. (x + 2)(x - 15)​