Hrozmarly needs to evaluate the following expression y^2-x^2 when y=9 and x=2. Her answer should be? i am in 6 grade

Question

Hrozmarly needs to evaluate the following expression y^2-x^2 when y=9 and x=2. Her answer should be?

i am in 6 grade

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Thu Giang 3 years 2021-09-05T01:39:44+00:00 1 Answers 10 views 0

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  1. bonexptip
    0
    2021-09-05T01:41:02+00:00
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    Answer:

    Step-by-step explanation:

    y^2 -x^2=

    y^2=9^2=81

    x^2=2^2=4

    81-4=77

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )