Question

if f(x)=x³-5x² +kx+8 is 2 then the value of k is​

Answer 1

Answer:

given x = 2,

then, f(2) = 2³ -5(2)² +k(2) +8 = 0

8 -20 +2k +8 =0

-4 +2k = 0

2k = 4

k = 4/2 => k = 2