Question

If α and β are zeroes of polynomial x² + 18x + 80 then the value of 3α + 3β will be

Answer 1

Answer:

x²+18x+80

x²+10x+8x+80

x(x+10)+8(x+10)

(x+10)(x+8)

x= -8,-10

let α= -8, β= -10

3α + 3β= 3(-8)+3(-10)

= -24-30

= -54