Question

Giúp mik giải bài tập toán vs ạ mik cảm ơn rất nhiều ạ

Answer 1

áp dụng bài hc sẽ ra

Answer 2

mờ quá

Answer 3

Trả lời:

a, ax - ay + bx - by = ( ax - ay ) + ( bx - by ) = a ( x - y ) + b ( x - y ) = ( x - y )( a + b )

b, ax - ay + bx - by (trùng ý a)

c, x² + xy + ax + ay = ( x² + xy ) + ( ax + ay ) = x ( x + y ) + a ( x + y ) = ( x + y )( x + a )

d, x²y + xy² - x - y = ( x²y - x ) + ( xy² - y ) = x ( xy - 1 ) + y ( xy - 1 ) = ( xy - 1 )( x + y )

e, x²y - xy² - 5x + 5y = ( x²y - xy² ) - ( 5x - 5y ) = xy ( x - y ) - 5 ( x - y ) = ( x - y )( xy - 5 )

f, 2x² + 2xy - x - y = ( 2x² + 2xy ) - ( x + y ) = 2x ( x + y ) - ( x + y ) = ( x + y )( 2x - 1 )

g, x²y - 4x + xy² - 4y = ( x²y - 4x ) + ( xy² - 4y ) = x ( xy - 4 ) + y ( xy - 4 ) = ( xy - 4 )( x + y )

h, x⁴ + x³ + x + 1 = ( x⁴ + x³ ) + ( x + 1 ) = x³ ( x + 1 ) + ( x + 1 ) = ( x + 1 )( x³ + 1 ) = ( x + 1 )( x + 1 )( x² - x + 1 ) = ( x + 1 )²( x² - x + 1) 

i, x⁴ - x³ - x + 1 = ( x⁴ - x³ ) - ( x - 1 ) = x³ ( x - 1 ) - ( x - 1 ) = ( x - 1 )( x³ - 1 ) = ( x - 1 )( x - 1 )( x² + x + 1 ) = ( x - 1 )²( x² + x + 1 )

j, x² + x - y² + y = ( x² - y² ) + ( x + y ) = ( x + y ) ( x - y ) + ( x + y ) = ( x + y )( x - y + 1 )

k, 4x² - 9y² + 4x - 6y = ( 4x² - 9y² ) + ( 4x - 6y ) = ( 2x - 3y ) ( 2x + 3y ) + 2 ( 2x - 3y ) = ( 2x - 3y )( 2x + 3y + 2 )

l, x² + x + 2xy + y + y² = ( x² + 2xy + y² ) + ( x + y ) = ( x + y )² + ( x + y ) = ( x + y )( x + y + 1 ) 

m, 16x² - 9 - 24xy + 9y² = ( 16x² - 24xy + 9y² ) - 9 = ( 4x - 3y )² - 3² =  ( 4x - 3y - 3 )( 4x - 3y + 3 )

n, 4x² - 4xy - 1 + y² = ( 4x² - 4xy + y² ) - 1 = ( 2x - y ) - 1 = ( 2x - y - 1 )( 2x - y + 1 )

o, Sửa đề:  x² - x - 2xy + y + y² = ( x² - 2xy + y² ) - ( x - y ) = ( x - y )² - ( x - y ) = ( x - y )( x - y - 1 )

Answer 4

mờ quá bạn ơi

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