Question

if X equal to 1 and X equal to 2 are zeroes of the polynomial x cube minus 8 x square + a x + b find value of a and b




please give me the answer fast​

Answer 1

polynomial=x^3-8x^2+ax+b

p(1)=0

1-8+a+b=0

-7+a+b=0

similarly

p(2)=0

=8-32+2a+b=0

-24+2a+b=0

since both the rhs is 0 we can equate the LHS

-7+a+b=-24+2a+b=

17-a=0

a=17

you can find the value of b through the above equation

please mark me as brainliest and please vote