SOLUTION: Please help me solve this problem 2x^2-14x+3x-21
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Question 199786: Please help me solve this problem 2x^2-14x+3x-21
Found 2 solutions by jim_thompson5910, RAY100:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
I'm assuming you want to factor
Start with the given expression
Group like terms
Factor out the GCF out of the first group. Factor out the GCF out of the second group
Since we have the common term , we can combine like terms
So factors to
If you have any questions, email me at jim_thompson5910@hotmail.com.
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Answer by RAY100(1637) (Show Source): You can put this solution on YOUR website!
when there are four terms, try factoring by grouping
.
2x^3 -14x +3x -21
.
2x (x-7) +3(x-7},,,,,,like ab +cb= (a+c)b ,,,but b=(x-7)
.
(2x+3) (x-7)
.
check by subst x=1 in original and answer, ok
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