Question

show that 3 is a zero of the polynomial 2x 3 - x 2 - 13x - 6. hence find all the other zeroes of this polynomial.

Answer 1

polynomial= 2x3-x2-13x-6
=>1st x=2
=>2×(2)3-(2)2-13×2-6
=>2×8+4-26-6
=>26-26
=>0

x=3
=>2×(3)3- (3)2-13×3-6
=>2×27+9-39-6
=>54+9-39-6
=>54-54

x=1/2
=>2×(1/2)3-(1/2)2-13×(1/2)-6
=>2×(1/8)+(1/4)-13×1/2-6
=>1/4+1/4-13/2-6/1
=>1+1-26-24
________
4
0
=>______
4
0

Answer 2

hey... here is your answer in the attachment