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3 votes
Simplify (3x+2)(x-7)

2 Answers

6 votes
the answer is

3 {x}^(2) - 19x - 14
first you must multiply or use the FOIL method (First, Outer, Inner, Last)
First you multiply the first terms

(3x)(x)
this gives you 3x^2, then you multiple the outer terms

( - 7)(3x)
this gives you -21x, then you multiply the inner terms

(2)(x)
that gives you 2x, finally you multiply the last terms

(2)( - 7)
that gives you 14, now you combine like terms

- 21x + 2x = - 19x
now you put all the terms together and end up with your solution

3 {x}^(2) - 19x - 14

User Anatoli Klamer
by
6.0k points
4 votes

Remember to follow the FOIL method.

Note that: FOIL = First, Outside, Inside, Last.

Multiply

First: (3x)(x) = 3x²

Outside: (3x)(-7) = -21x

Inside: (2)(x) = 2x

Last: (2)(-7) = -14

-------------------------------------------------------------------------------------------------------------

3x² -21x + 2x -14

Combine like terms

3x² (-21x + 2x) - 14

3x² - 19x - 14

3x² - 19x - 14 is your answer

~Rise Above the Ordinary

User Rogala
by
5.6k points