MCQ
The value of the expression $\frac{5}{3} x^2+1$ when $x=-2$ is
- A$\frac{-17}{3}$
- B$\frac{-7}{3}$
- C$\frac{21}{3}$
- ✓$\frac{23}{3}$
✓
Answer
Correct option: D.
$\frac{23}{3}$
$\frac{5}{3} x^2+1$
$=\frac{5}{3}(-2)^2+1$
$=\frac{5}{3} \times 4+1$
$=\frac{20}{3}+1$
$=\frac{23}{3}$
$=\frac{5}{3}(-2)^2+1$
$=\frac{5}{3} \times 4+1$
$=\frac{20}{3}+1$
$=\frac{23}{3}$
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