Question

Find the zeros of the quadratic polynomial 2x²+11x-30

Answer 1

Answer:

By factor theorem :

If p(x)=0 then (x-1) will be a factor of p(x)

so here

p(x)= 2x²+11x-30

Here the factor of 30is( +-)2,(+-)3,(+-5)

let be take the first factor =2

p(x)=2×(2)²+11×2-30

p(x)= 8+22-30=0

Hence (x-2)is a factor of given polynomial..