If a=x+y and b=x-y show that (a+b)2=4×2​

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If a=x+y and b=x-y show that (a+b)2=4×2​

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Ngọc Hoa 6 months 2021-09-03T18:39:17+00:00 1 Answers 0 views 0

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    2021-09-03T18:41:04+00:00

    Answer:

    see explanation

    Step-by-step explanation:

    a + b = x + y + x – y = 2x , then

    (a + b)² = (2x)² = 4x² ← as required

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