Question

if polynomial p(x)=x³-6x²+ax+10 of a zero 5 have so a=____​

Answer 1

Answer:

p(5)=(5)³-6×(5)²+a×(5)+10

=625-210+5a+10

=415+5a+10

=425+5a

So, 5a=425

And finally we get,

a=425/5

a=85