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5 August, 20:45

Thw sum of 12x^2+9x^2

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  1. 5 August, 21:05
    0
    21 x^2

    Step-by-step explanation:

    12x^2+9x^2

    Combine like terms

    x^2 (12+9)

    x^2 (21)

    21 x^2
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