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Substitute given values into a polynomial and evaluate

This type of question, asked 2 times: 14 Jul 2023 S1, 24 Jul 2023 S2. All 2 questions below, oldest first.

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  1. Question 1

    14 Jul 2023 S1

    69
    What is the value of (3x3+5x2y+12xy2+7y3)(3x^3 + 5x^2y + 12xy^2 + 7y^3), when x=−4x = -4 and y=−1y = -1?

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  2. Question 2

    24 Jul 2023 S2

    56
    The value of x2+y2x^2 + y^2 when x=1x = 1, y=2y = 2 is:

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