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

Toán Lớp 8: 1) (x-5)^2 2) (3+2x)^2 3) (4-x0^2 4) (x+8)^2 5) (2x-5)^2 6) (3x+1)^2 7) (4-2x)^2 8) (x+6)^2 9) (1-5x)^2 10) (3x-1)^2 giúp em vớii tối

Tháng Mười 2, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: 1) (x-5)^2
2) (3+2x)^2
3) (4-x0^2
4) (x+8)^2
5) (2x-5)^2
6) (3x+1)^2
7) (4-2x)^2
8) (x+6)^2
9) (1-5x)^2
10) (3x-1)^2
giúp em vớii tối nay e phải nộp rồi
cảm ơn mng trc ạ!

Comments ( 2 )

  1. khanhngantoan
    khanhngantoan
    2 Tháng Mười, 2022 at 7:07 chiều
    Reply
    1, (x-5)^2
    => x^2 – 10x + 25
    2, (3+2x)^2
    => 9 + 12x + 4x^2
    3, (4-x0^2
    => 16 – 8x + x^2
    4, (x+8)^2
    => x^2 + 16x + 64
    5, (2x-5)^2
    => 4x^2 – 20x + 25
    6, (3x+1)^2
    => 9x^2 + 6x + 1
    7, (4-2x)^2
    => 16 – 16x + 4x^2
    8, (x+6)^2
    => x^2 + 12x + 36
    9) (1-5x)^2
    => 1 – 10x + 25x^2
    10) (3x-1)^2
    => 9x^2 – 6x + 1
    smoke weed everyday

  2. mocmien87
    mocmien87
    2 Tháng Mười, 2022 at 7:07 chiều
    Reply
    #White
    1)
    (x-5)^2
    = x^2-10x+25
    2)
    (3+2x)^2
    = 3^2+12x+(2x)^2
    = 9+12x+4x^2
    3)
    (4-x)^2
    = 4^2-8x+x^2
    = 16-8x+x^2
    4)
    (x+8)^2
    = x^2+16x+8^2
    = x^2+16x+64
    5)
    (2x-5)^2
    = (2x)^2-20x+5^2
    = 4x^2-20x+25
    6)
    (3x+1)^2
    = (3x)^2+6x+1
    = 9x^2+6x+1
    7)
    (4-2x)^2
    = 4^2-16x+(2x)^2
    = 16-16x+4x^2
    8)
    (x+6)^2
    = x^2+12x+6^2
    = x^2+12x+36
    9)
    (1-5x)^2
    = 1-10x+(5x)^2
    = 1-10x+25x^2
    10)
    (3x-1)^2
    = (3x)^2-6x+1
    = 9x^2-6x+1
    Áp dụng:
    +) (a+b)^2 = a^2+2ab+b^2
    +) (a-b)^2 = a^2-2ab+b^2
     

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

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