Question

find a if x-5 is a factor of x^3-4x^2+ax+60​

Answer 1

Answer:

-17

Step-by-step explanation:

x-5=0

x=5

x^3-4x^2+ax+60= (5)^3-4(5)^2+a5+60

=125-100+5a+60

= 25+60+5a

= 85+5a

-85=5a

a=-17

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Answer 2

Step-by-step explanation:

x-5=0,X=5 then (5)^3-4(5)^2+5a+60=0

125-100+5a+60=0

25+5a+60=0

85+5a=0

5a=-85

a=(-17)