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

Toán Lớp 8: c) (x^ 2 − 2xy + y ^2 ) : (y − x) d) (4x^2 − 9y^2) : (2x − 3y) e) (8x^3 + 1) : (4x^2 − 2x + 1) f) (x^2 − 3x + xy − 3y) : (x + y)

Home/ Toán Lớp 8: c) (x^ 2 − 2xy + y ^2 ) : (y − x) d) (4x^2 − 9y^2) : (2x − 3y) e) (8x^3 + 1) : (4x^2 − 2x + 1) f) (x^2 − 3x + xy − 3y) : (x + y)

Toán Lớp 8: c) (x^ 2 − 2xy + y ^2 ) : (y − x) d) (4x^2 − 9y^2) : (2x − 3y) e) (8x^3 + 1) : (4x^2 − 2x + 1) f) (x^2 − 3x + xy − 3y) : (x + y)

Tháng Mười 8, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: c) (x^ 2 − 2xy + y ^2 ) : (y − x)
d) (4x^2 − 9y^2) : (2x − 3y)
e) (8x^3 + 1) : (4x^2 − 2x + 1)
f) (x^2 − 3x + xy − 3y) : (x + y)

Comments ( 2 )

  1. landinhngoc97
    landinhngoc97
    8 Tháng Mười, 2022 at 1:43 sáng
    Reply
    $y10000$

    toan-lop-8-c-2-2y-y-2-y-d-4-2-9y-2-2-3y-e-8-3-1-4-2-2-1-f-2-3-y-3y-y

  2. thuminhthong
    thuminhthong
    8 Tháng Mười, 2022 at 1:43 sáng
    Reply
    c)
    (x^2 – 2xy+y^2) : (y-x)
    = (y-x)^2 : (y-x)
    = y-x
    d)
    (4x^2 – 9y^2) : (2x-3y)
    = [ (2x)^2 – (3y)^2] : (2x-3y)
    = (2x-3y)(2x+3y) : (2x-3y)
    = 2x+3y
    e)
    (8x^3+1) : (4x^2 – 2x+1)
    = [ (2x)^3 + 1^3] : (4x^2 – 2x+1)
    = (2x+1)[ (2x)^2 – 2x . 1 + 1^2] : (4x^2 -2x+1)
    = (2x+1)(4x^2 – 2x+1) : (4x^2-2x+1)
    = 2x+1
    f)
    (x^2 – 3x + xy-3y) : (x+y)
    = [ x (x-3) + y (x-3)] : (x+y)
    = (x+y)(x-3) : (x+y)
    = x-3

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

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