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

Toán Lớp 8: a) 2×3 – 4×2 + 6x b) 2x(x – 4) + 3(x – 4) c) 3×4 – 6×3 + 9×2 d) 3x(x – 5) + 4(5 – x) e) 4x(x – 6) – 5(6 – x) f) x2(x – 7) + 2x(7 – x) g

Tháng Sáu 28, 2022 Toán học 1 Comment 0 views

Toán Lớp 8: a) 2×3 – 4×2 + 6x b) 2x(x – 4) + 3(x – 4)
c) 3×4 – 6×3 + 9×2 d) 3x(x – 5) + 4(5 – x)
e) 4x(x – 6) – 5(6 – x) f) x2(x – 7) + 2x(7 – x)
g) x2 + 2x + 1 h) x2 – 4x + 4
i) x2 – 4 j) 4×2 – 9
GIÚP MÌNH VỚIII

Comments ( 1 )

  1. diemmyhoa
    diemmyhoa
    28 Tháng Sáu, 2022 at 2:53 chiều
    Reply
    a)2x^3-4x^2+6x
    =2x.(x^2-2x+3)
    b)2x.(x-4)+3.(x-4)
    =(x-4).(2x+3)
    c)3x^4-6x^3+9x^2
    =3x^2.(x^2-2x+3)
    d)3x.(x-5)+4.(5-x)
    =3x.(x-5)-4.(x-5)
    =(x-5).(3x-4)
    e)4x.(x-6)-5.(6-x)
    =4x.(x-6)+5.(x-6)
    =(x-6).(4x+5)
    f)x^2.(x-7)+2x.(7-x)
    =x^2.(x-7)-2x.(x-7)
    =(x-7).(x^2-2x)
    =x.(x-7).(x-2)
    g)x^2+2x+1
    =(x+1)^2
    h)x^2-4x+4
    =(x-2)^2
    i)x^2-4
    =(x-2).(x+2)
    j)4x^2-9
    =(2x-3).(2x+3)
    mk gửi nha~
    $#chúc tus học tốt!!$
     

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

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