Check whether the polynomial $q(t) = 4t^3 + 4t^2 - t - 1$ is a multiple of $2t + 1$.

Vedclass pdf generator app on play store
Vedclass iOS app on app store
(A) To check if $q(t)$ is a multiple of $2t + 1$,we need to determine if $2t + 1$ is a factor of $q(t)$.
According to the Factor Theorem,$2t + 1$ is a factor of $q(t)$ if $q(-\frac{1}{2}) = 0$.
Setting $2t + 1 = 0$,we get $t = -\frac{1}{2}$.
Now,substituting $t = -\frac{1}{2}$ into the polynomial $q(t)$:
$q(-\frac{1}{2}) = 4(-\frac{1}{2})^3 + 4(-\frac{1}{2})^2 - (-\frac{1}{2}) - 1$
$q(-\frac{1}{2}) = 4(-\frac{1}{8}) + 4(\frac{1}{4}) + \frac{1}{2} - 1$
$q(-\frac{1}{2}) = -\frac{1}{2} + 1 + \frac{1}{2} - 1 = 0$.
Since the remainder is $0$,$2t + 1$ is a factor of $q(t)$.
Therefore,$q(t)$ is a multiple of $2t + 1$.

Explore More

Similar Questions

Find the zero of the polynomial: $p(x) = cx + d$,where $c \neq 0$ and $c, d$ are real numbers.

Find the remainder when $x^{3}+3x^{2}+3x+1$ is divided by $x-\frac{1}{2}$.

Difficult
View Solution

Factorise: $6x^2 + 5x - 6$

Check whether $-2$ and $2$ are zeroes of the polynomial $x + 2$.

Verify whether the following are zeroes of the polynomial indicated against them:
$p(x) = 3x^2 - 1, x = -\frac{1}{\sqrt{3}}, \frac{2}{\sqrt{3}}$

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo