Question

What is `x^3-2y^2-3x^3+z^4` if `x=3, y=5,` and `z=-3`?

Answer 1

`-23`

Explanation:

We can evaluate the given algebraic expression by simplifying
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the expression ,then substituting the values of `x, y and z.`
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`x^3-2y^2-3x^3+z^4" "`Arranging similar monomials
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`=x^3-3x^3-2y^2+z^4`
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`=-2x^3-2y^2+z^4`
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`=-2(3)^3-2(5)^2+(-3)^4`
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`=-2xx27-2xx25+81`
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`=-54-50+81`
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`=-104+81`
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`=-23`

Answer 2

`-23`

Explanation:

To evaluate the expression, substitute the given values for x, y and z into it.

The expression can be simplified by collecting like terms.

`rArr-2x^3-2y^2+z^4`

`=-2xx(3)^3-2xx(5)^2+(-3)^4`

`=(-2xx27)-(2xx25)+81`

`=-54-50+81=-23`