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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: (2x + 1)2 + (7 – x)(7 + x) –2.(25 + 12x)

Home/ Toán Lớp 8: (2x + 1)2 + (7 – x)(7 + x) –2.(25 + 12x)

Toán Lớp 8: (2x + 1)2 + (7 – x)(7 + x) –2.(25 + 12x)

Tháng Bảy 6, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: (2x + 1)2 + (7 – x)(7 + x) –2.(25 + 12x)

Comments ( 2 )

  1. thanhtung
    thanhtung
    6 Tháng Bảy, 2022 at 7:35 sáng
    Reply
    ( 2x + 1 )^2 + (7 – x)(7 + x) –2.( 25 + 12x )
    = 4x^2 + 4x + 1 + 49 – x^2 – 50 – 24x
    =3x^2 -20x
    =x( 3x – 20 )
     

  2. maitrucloan
    maitrucloan
    6 Tháng Bảy, 2022 at 7:35 sáng
    Reply
    (2x+1)^2+(7-x)(7+x)-2(25+12x)
    =4x^2+4x+1+49-x^2-50-24x
    =3x^2-20x

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222-9+11+12:2*14+14 = ? ( )

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