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16 February, 20:47

What is the value of the expression 2x2 + 3x-y - 4y2 when x = 2 and y = - 4?

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  1. 16 February, 21:10
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    Write the problem: 2x^2+3x-y-4y^2

    Substitute x and y: 2 (2) ^2+3 (2) - (-4) - 4 (-4) ^2

    Exponents and Multiplication: 8+6+4-64

    Add and Subtract: - 46

    Your Answer is - 46
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