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2. Polynomials
medium
Find the value of each of the following polynomials at the indicated value of variables
$p(t)=5 t^{2}-11 t+7$ at $t=a$
Option A
Option B
Option C
Option D
Solution
$p(t)=5 t^{2}-11 t+7$
Replacing $t$ by $a,$ we get
$p(a)=5(a)^{2}-11(a)+7=5 a^{2}-11 a+7$
Therefore, the value of $p(t)$ at $t=a$ is $5 a^{2}-11 a+7$
Standard 9
Mathematics