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

2 Answers
Nov 19, 2016

-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

Nov 19, 2016

-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