Question

The value of $3{\mathrm{x}}^2–5\mathrm{x}+3$ when $\mathrm{x}=1$ is

• A. $1$
• B. $0$
• C. $-1$
• D. $11$

Answer 1

The correct option is A

$1$

Explanation for correct option:

Find the value of $3{\mathrm{x}}^2–5\mathrm{x}+3$ when $\mathrm{x}=1$

$\begin{array}{rcl}3{\mathrm{x}}^2–5\mathrm{x}+3& =& 3{\left(1\right)}^2–5\left(1\right)+3\left[\because x=1\right]\\ & =& 3-5+3\\ & =& -2+3\\ & =& 1\\ \therefore 3{\mathrm{x}}^2–5\mathrm{x}+3& =& 1\end{array}$

Hence, the correct option is A.