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28 August, 01:15

What is the sum or difference?

a. 5x4 + 4x4

b. 12x5y - 9x5y

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Answers (1)
  1. 28 August, 01:20
    0
    a. 9x^4

    b. 3 x^5y

    Step-by-step explanation:

    a. 5x^4 + 4x^4

    Combine like terms

    9x^4

    b. 12x^5 y - 9x^5 y

    Subtract like terms

    3 x^5y
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