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Green Eyes
Lv 5
Green Eyes asked in Science & MathematicsMathematics · 1 decade ago

Substituting values of variables in expressions?

If u=3 and v=1 then u to the 2nd power + 5 uv = ?

I have the answer but I need to know how it is done. Thanks for your help!

3 Answers

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  • DWRead
    Lv 7
    1 decade ago
    Favorite Answer

    u² + 5uv = 3² + 5·3·1

    Do the exponent first:

    = 9 + 5·3·1

    Then the multiplication

    = 9 + 15·1

    = 9 + 15

    Finally, the addition

    = 24

  • Tensai
    1 decade ago

    If u=3 and v=1 then u^2 + 5uv = ?

    =3^2 + 5(3)(1)

    =9+15

    =24

  • steve
    1 decade ago

    given u = 3 and v = 1

    u^2 + 5 u v = ?

    where u is put the number 3 and where v is replace it with a 1

    u^2 + 5 u v =

    (3)^2 + 5 * (3) * (1) =

    3*3 + 5 *3 =

    the rest you can solve

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