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Evaluate the expression -2x + 5xy + 12x + 9y when x=1 and y=2.

Mathematics

ScanSolve AI Answer

Answer

38\textbf{38}

Step-by-step solution

3 steps

  1. Substitute x=1x=1 and y=2y=2 into the expression.

    −2(1)+5(1)(2)+12(1)+9(2)-2(1) + 5(1)(2) + 12(1) + 9(2)

  2. Perform the multiplications.

    −2+10+12+18-2 + 10 + 12 + 18

  3. Add the terms together.

    (−2+10)+12+18=8+12+18(-2 + 10) + 12 + 18 = 8 + 12 + 18 8+12+18=20+188 + 12 + 18 = 20 + 18 20+18=3820 + 18 = 38

    The value of the expression is:

    38\textbf{38}
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