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Factor completely 7x2-45x-28

Factor completely 7x2-45x-28
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7 votes
Factor completely 7x2-45x-28

asked
User Dubloons
by
8.1k points

1 Answer

10 votes

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)

answered
User Ariel Kogan
by
8.0k points
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