Question

check whether x+5 is a factor of x³ -125​

Answer 1

let x+5 = 0

x = -5

now,

p (x) = x³ -125

{putting x = -5}

p(-5) = -5³-125

p( -5)= -125 -125

p(-5) = 0

hence ..if value become 0 so,

x+5 is factor of x³-125