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

Toán Lớp 9: Phân tích các đa thức sau thành nhân tử a) x – √x – 6 b) x – 4√x + 3 c) x – 5√x + 6 d) x + 2√x – 3 e) x + √x – 2 f) x – √x – 12

Toán Lớp 9: Phân tích các đa thức sau thành nhân tử
a) x – √x – 6
b) x – 4√x + 3
c) x – 5√x + 6
d) x + 2√x – 3
e) x + √x – 2
f) x – √x – 12

Comments ( 2 )

  1. Giải đáp + giải thích :
              ↓↓↓
     

    toan-lop-9-phan-tich-cac-da-thuc-sau-thanh-nhan-tu-a-6-b-4-3-c-5-6-d-2-3-e-2-f-12

  2.  
    1. a) x – √x – 6 = x – 3√x + 2√x – 6
    = √x ( √x – 3 ) + 2 (√x – 3 )
    = (√x + 2 ) (√x – 3 )
    1. b) x – 4√x + 3 = ( x – 4√x + 4 ) – 1
    = (√x – 2 )2 – 12
    = (√x – 2 – 1 ) (√x – 2 + 1 )
    = (√x – 3 ) ( √x – 1 )
    1. c) x – 5√x + 6 = x – 2√x – 3√x + 6
    = (√x – 2 ) (√x – 3 )
    1. d) x + 2√x – 3 = x + √x – 3√x – 3
    = √x ( √x + 1 ) – 3 (√x – 1 )
    = (√x – 3 ) (√x – 1 )
    1. e) x + √x – 2 = x – √x + 2√x – 2
    = (√x + 2 ) (√x – 1 )
    1. f) x – √x – 12 = x – 4√x + 3√x – 12
    = (√x + 3 ) (√x – 4 )

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