Question

if -1 is a zero of the polynomial 2X^3-X^2-5X-2, find its other zeroes

Answer 1

◆ ∆nswer ◆

-Flies Away
#Superman

Answer 2

one zero = -1
g(x) = x+1
p(x) = 2x³-x²-5x-2
p(x) ÷g(x)
2x³-x²-5x-2÷x+1
Remainder = 0
and Quotient = 2x²-3x-2
2x²-3x-2
2x²-4x+x-2
x(x-2)+1 (x-2)
(x-2)(x+1)
x-2= 0. x+1=0
x = 2. x= -1

hence,
Other zero = 2...