SOLUTION: Show that 1/2 is a root of the polynomial expression 2x^3+5x^2-39x+18

Algebra.Com
Question 909502: Show that 1/2 is a root of the polynomial expression 2x^3+5x^2-39x+18

Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
IF is a root, then evaluation of the polynomial for would be 0.

;
Is this equal to 0 ?








---------Yes, is a root for the given polynomial.

RELATED QUESTIONS

2.a. Show that ½ is a root of the polynomial expression 2x3 + 5x2- 39x + 18... (answered by richwmiller)
show that 1/2 is a root of the polynomial expression 2x^3+5x^2-39x+18 I need to see... (answered by josgarithmetic)
Given that 7 is a zero of the polynomial P(x)=x^3-12x^2+39x-28, determine all... (answered by josgarithmetic)
Show that x = 1 is the only rational root for the polynomial f(x) = x^3 - 5x^2 +5x -... (answered by josgarithmetic)
The question is: Show that {{{(2x+1)}}} is a factor of the polynomial {{{... (answered by AnlytcPhil)
Show that the product of 6x^2-13x-5, 15x^2-16x-7, and 10x^2-39x+35 is a perfect square by (answered by stanbon)
A polynomial expression is show below. (mx^3+3)(2x^2+5x+2)-(8x^5+20x^4) The expression is (answered by amarjeeth123)
Factors of Polynomial Equations of Degree greater than 2 Give the factored form of the... (answered by MathLover1,greenestamps)
Hello, sorry to be a bother!!! But I need help a usual!! Here are my problems!! 1.... (answered by sarah_adam)