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Polynomials

Find the valu...

Question

Find the value of expression, $x^{3} - 5 x - 2 y - 3 z$ when $x = - 2$ , $y = - 3$ , and $z = 4$ .

- 2

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Solution

The correct option is B $- 4$

Putting $x = - 2$ , $y = 3$ , and $z = 4$ in the expression, $x^{3} - 5 x - 2 y - 3 z$ we get the value as follows:

$x^{3} - 5 x - 2 y - 3 z$
$= (- 2)^{3} - 5 (- 2) - 2 (- 3) - 3 (4)$
$= - 8 + 10 + 6 - 12$
$= - 20 + 16$
$= - 4$

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Similar questions

Find the value of expression, $x^{3} - 5 x - 2 y - 3 z$ when $x = - 2$ , $y = - 3$ , and $z = 4$ .

\frac{x}{2} = \frac{y}{3} = \frac{z}{4}

\frac{x}{3} = \frac{y}{4} = \frac{z}{2} and \frac{x}{4} = \frac{y}{2} = \frac{z}{3}

x + 5 y + 4 z = 3

2 x + 2 y + 3 z = 4

4 x - 2 y + z = 9

x, y, z

x - 2 y + 3 z = 11

3 x + y - z = 2

5 x + 3 y + 2 z = 3

x = - 1

y = 2

{2 x}^{2} - 3 y + {3 x}^{2} + {5 x}^{2} + 5 x - 7 - 7 x + 2 y

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