Question
Find the value of the expression $2x^2 – x – 2$, when $x = –1$
✓
Answer
The given expression is: $2 x^2-x-2$
Put $x=-1$, we get
$2 x^2-x-2=2(-1)^2-(-1)-2$
$=2(1)+1-2$
$=2+1-2$
$=3-2=1$
Put $x=-1$, we get
$2 x^2-x-2=2(-1)^2-(-1)-2$
$=2(1)+1-2$
$=2+1-2$
$=3-2=1$
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