Question

Factor completely 7x2-45x-28

Answer 1

9514 1404 393

Answer:

(x -7)(7x +4)

Explanation:

The term -45x can be rewritten using factors of (7)(-28) that have a total of -45. Those factors would be ...

(7)(-28) = (4)(-49)

7x^2 +4x -49x -28 = x(7x +4) -7(7x +4) = (x -7)(7x +4)