Question

Find the value of the polynomial $4x^2-5x+3$, when $x=2$

• A. $7$
• B. $8$
• C. $9$
• D. $10$

Answer 1

The correct option is C $9$

Given polynomial $p\left(x\right)=4x^2-5x+3$

We need to find value of polynomial at $x=2$.

Replace $x$ by $2$, we get

$p\left(2\right)=4(2{)}^2-5(2)+3$

$\Rightarrow p\left(2\right)=4\times 4-(5\times 2)+3$

$\Rightarrow p\left(2\right)=16-10+3$

$\Rightarrow p\left(2\right)=9$