find (f-g)(x) when f(x)=3x+2 g(x)=2x^2-4 h(x)=x^2-x+7

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find (f-g)(x) when f(x)=3x+2 g(x)=2x^2-4 h(x)=x^2-x+7

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Edana Edana 4 months 2021-08-12T07:45:49+00:00 1 Answers 0 views 0

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    2021-08-12T07:47:38+00:00

    (f + g)(x) = f (x) + g(x)

    = [3x + 2] + [4 – 5x]

    = 3x + 2 + 4 – 5x

    = 3x – 5x + 2 + 4

    = –2x + 6

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