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

Toán Lớp 8: 6x+3-(2x-5)(2x+1) (X-5)^+(x+5)(x-5)-(5-x)(2x+1)

Home/ Toán Lớp 8: 6x+3-(2x-5)(2x+1) (X-5)^+(x+5)(x-5)-(5-x)(2x+1)

Toán Lớp 8: 6x+3-(2x-5)(2x+1) (X-5)^+(x+5)(x-5)-(5-x)(2x+1)

Tháng Sáu 22, 2022 Toán học 1 Comment 0 views

Toán Lớp 8: 6x+3-(2x-5)(2x+1)
(X-5)^+(x+5)(x-5)-(5-x)(2x+1)

Comments ( 1 )

  1. trucoanh55
    trucoanh55
    22 Tháng Sáu, 2022 at 1:39 chiều
    Reply
    a) 6x+3-(2x+5)(2x+1)
    =6x+3-4x^2-2x-10x-5
    =-4x^2-6x-2
    b) Sửa đề:
    (x-5)^2+(x+5)(x-5)-(5-x)(2x+1)
    =x^2-10x+25+x^2-25-10x-5+2x^2+x
    =3x^2-19x-5
     

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

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