SOLUTION: Hello,I'd like help on this question Factor ​f(x)=4x^3+11x^2-40x+25 into linear factors given that −5 is a zero of​ f(x). Thank you

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Question 1142729: Hello,I'd like help on this question
Factor ​f(x)=4x^3+11x^2-40x+25 into linear factors given that −5 is a zero of​ f(x).
Thank you
Answer by josgarithmetic(39618)   (Show Source): You can put this solution on YOUR website!
​f(x)=4x^3+11x^2-40x+25 into linear factors given that −5 is a zero 


-5   |   4   11   -40   25
     |
     |      -20    45   -25
     ---------------------------------
         4  -9    5     0



Zeros of the quadratic factor:




Try testing for as a zero.
1   |   4    -9    5
     |
     |        4    -5
     |------------------------
        4    -5    0

This means is also a linear factor.


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