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If x=4, y=3 and z=-1, simplify: 1. 2x+3y-x+2y 2. (11x-y)/z

Mathematics

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Step-by-step solution

3 steps

  1. Numerator 2x+3y−x2y2x + 3y - x^2 y

    2x+3y−x2y2x + 3y - x^2 y

    Substitute x=3x=3, y=5y=5:

    2(3)+3(5)−(3)2(5)2(3) + 3(5) - (3)^2 (5) 6+15−9⋅56 + 15 - 9 \cdot 5 21−4521 - 45 −24-24

  2. Denominator xzxz

    xzxz

    Substitute x=3x=3, z=1z=1:

    3⋅13 \cdot 1 33

  3. Divide

    −243\frac{-24}{3} −8-8

    Final answer: -8

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