Question
Find the value of expression $19-5 x^2$ for $x = 2$.
✓
Answer
The given expression is: $19-5 x^2$
Put $x=2$, we get
$19-5 x^2=19-\left(5 \times 2^2\right)$
$=19-(5 \times 4)$
$=19-20$
$=-1$
Put $x=2$, we get
$19-5 x^2=19-\left(5 \times 2^2\right)$
$=19-(5 \times 4)$
$=19-20$
$=-1$
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