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

Toán Lớp 8: a) x^2+ 6x + 9 =… b) x^2 – 10x + 25=… c) (x+3)(x-3) =… d) x^3 + 12x^2 + 48x + 64 e) x^3 -6x^2 +12x – 8 =… f) (x+2) (x^2-2x+4)

Home/ Toán Lớp 8: a) x^2+ 6x + 9 =… b) x^2 – 10x + 25=… c) (x+3)(x-3) =… d) x^3 + 12x^2 + 48x + 64 e) x^3 -6x^2 +12x – 8 =… f) (x+2) (x^2-2x+4)

Toán Lớp 8: a) x^2+ 6x + 9 =… b) x^2 – 10x + 25=… c) (x+3)(x-3) =… d) x^3 + 12x^2 + 48x + 64 e) x^3 -6x^2 +12x – 8 =… f) (x+2) (x^2-2x+4)

Tháng Tám 2, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: a) x^2+ 6x + 9 =…
b) x^2 – 10x + 25=…
c) (x+3)(x-3) =…
d) x^3 + 12x^2 + 48x + 64
e) x^3 -6x^2 +12x – 8 =…
f) (x+2) (x^2-2x+4) =…
g) (x-3)(x^2-2x+4) =…
h) 16x^2 -8x + 1 =..
i) (x+4)(x^2-4x+16) =…

Comments ( 2 )

  1. giahan44
    giahan44
    2 Tháng Tám, 2022 at 1:35 sáng
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
    a) = ????2+3????+3????+9
    = ????(????+3)+3(????+3)
    =(????+3)(????+3)
    = (????+3)^2
    b) 
    x = ????^2−5????−5????+25
    x= ????(????−5)−5(????−5)
    x= (????−5)(????−5)
    x= (????−5)^2
    c) 
    x=????(????−3)+3(????−3)
     = ????^2−3????+3(????−3)
     = ????^2−3????+3????−9
     = ????^2−9

  2. maingocquynhnhu2k1
    maingocquynhnhu2k1
    2 Tháng Tám, 2022 at 1:35 sáng
    Reply
    a) x^2+ 6x + 9 =.(x+3)^2..
    b) x^2 – 10x + 25=..(x-5)^2.
    c) (x+3)(x-3) =..x^2-9.
    d) x^3 + 12x^2 + 48x + 64=(x+4)^3
    e) x^3 -6x^2 +12x – 8 =.(x-2)^3.
    f) (x+2) (x^2-2x+4) =..x^3+8.
    g) (x-3)(x^2-2x+4) =.x^3-27…
    h) 16x^2 -8x + 1 =.(4x-1)^2.
    i) (x+4)(x^2-4x+16) =..x^3+64.
    Bn áp dụng hằng đẳng thức ý
    1;2.
    (A±B)^2=A^2±2AB+B^2
    3.A^2-B^2=(A-B)(A+B)
    4;5.
    (A±B)^3=A^3±3A^2B+3AB^2±B^3
    6;7.
    A^3±B^3=(A±B)(A^2±AB+B^2)
     

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

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