Đáp án:
Giải thích các bước giải:
$\text{a, ($4x^{4}$ - y²):(2x²+y)}$
$\text{=(2x²-y)(2x²+y):(2x²+y)}$
$\text{=2x²-y}$
$\text{b, [(x+y+z)²-4z²]:(x+y-z)}$
$\text{=(x+y+z+2z)(x+y+z-2z):(x+y-z)}$
$\text{=(x+y+3z)(x=y-z):(x+y-z)}$
$\text{=x+y+3z}$
$\text{c, [(8x³+y³)(4x²-y²)]:[(2x+y)²(4x²-2xy+y²)]}$
$\text{=[(2x+y)(4x²-2xy+y²)(2x-y)(2x+y)]:[(2x+y)²(4x²-2xy+y²)]}$
$\text{=[(2x+y)²(4x²-2xy+y²)(2x-y)]:[(2x+y)²(4x²-2xy+y²)]}$
$\text{= 2x-y}$
Xin hay nhất ạ!
