Question

the polynomial f(x) =x+15x+9x-a when divided by (x+4) leaves a remainder-80, find the value of a​

Answer 1

Put x = -4

- 64 + 240 - 36 - a = -80

140 - a = -80

a = 220

Answer 2

Step-by-step explanation:

f(x)=0

(x+4)=0

=>x=-4

f(x)=>-4+15(-4)+9(-4)-a=-80

=>-4-60-36-a=-80

=>-110-a=-80

=>-a=-80+110

=>-a=30

=>a=-30