Toán Lớp 8: x.(x+y)-3x-3y
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Toán Lớp 8: x.(x+y)-3x-3y
phân tích nhân tử
Comments ( 2 )
x.(x+y)-3x-3y
=x.(x+y)-(3x+3y)
=x(x+y)-3.(x+y)
=(x+y).(x-3)
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x.( x + y ) – 3x – 3y
= x.(x+y)-( 3x + 3y )
= x.(x+y)-3 ( x +y )
=( x – 3 )(x + y )