MCQ
The value of the polynomial $5 x-4 x^2+3$, when $x = -1$ is:
- A$6$
- ✓$-6$
- C$1$
- D$-1$
✓
Answer
Correct option: B.
$-6$
$5 x-4 x^2+3$
$=-4 x^2+5 x+3$
Putting $x = -1$ in the given polynomial, we get
$-4(-1)^2+5(-1)+3= -4 - 5 + 3$
$= -9 + 3$
$= -6$
$=-4 x^2+5 x+3$
Putting $x = -1$ in the given polynomial, we get
$-4(-1)^2+5(-1)+3= -4 - 5 + 3$
$= -9 + 3$
$= -6$
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