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Các bạn làm giúp mình với . Bạn nào lm 2 bài và đúng thì mk sẽ vote 5 sao
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Khải Quang
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a, $16x^4(x-y)-x+y$
= $16x^4(x-y)-(x-y)$
= $(16x^4-1)(x-y)$
b, $2x³y-2xy³-4xy²-2xy$
= $2xy(x²-y²-2y-1)$
=$2xy [x²-(y²+2y+1)]$
=$2xy[x²-(y+1)²]$
= $2xy(x²-y-1)(x²+y+1)$
c, $x(y²-z²)+y(z²-x²)+2(x²-y²)$
= $x(y-z)(y+z)+y(z-x)(z+x)+2(x-y)(x+y)$
Bài 1
a, $16x^4(x-y)-x+y$
= $16x^4(x-y)-(x-y)$
= $(16x^4-1)(x-y)$
b, $2x³y-2xy³-4xy²-2xy$
= $2xy(x²-y²-2y-1)$
=$2xy [x²-(y²+2y+1)]$
=$2xy[x²-(y+1)²]$
= $2xy(x²-y-1)(x²+y+1)$
c, $x(y²-z²)+y(z²-x²)+2(x²-y²)$
= $x(y-z)(y+z)+y(z-x)(z+x)+2(x-y)(x+y)$