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Show/Explain that (3x – 4)(x + 7) = 3x + 17x – 28.

Show/Explain that (3x – 4)(x + 7) = 3x + 17x – 28.
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21 votes
Show/Explain that
(3x – 4)(x + 7) = 3x + 17x – 28.

asked
User Jberrio
by
7.3k points

1 Answer

6 votes

Answer:

Explanation:

You expand the brackets:


  • 3x(x) =3x^(2)

  • 3x(7) = 21x

  • -4(x)=-4x

  • -4(+7)=-28

Now you simplify and collect like terms:


3x^(2) (+21x-4x)-28


3x^(2) +17x-28

answered
User Jonathan Dion
by
8.1k points
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