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22 January, 05:11

2r^2+3s^3-r2+4t^2-r2

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  1. 22 January, 06:50
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    2r^2 + 3s^3 - r^2 + 4t^2 - r^2

    =3s^3 + 4t^2

    =3 * (-3) ^3 + 4 * (5) ^2

    = - (3*27) + (4*25)

    =-81 + 100

    =19

    Answer is 19
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