Question

find m if x³+2x²-3mn-8 is divisible by x-4​

Answer 1

Answer:

Step-by-step explanation:

if x-4 divides x³+2x²-3mx-8, then put x=4 in this we will get 0 as a remainder

therefore,

4^3 + 2×4^2 - 3×m×4 - 8 = 0

64 + 32 - 12m - 8 = 0

88 + 12m = 0

m = -88/12

m = -11/3