Toán Lớp 8: Rút gọn phân thức sau:
$a)S=$$\frac{x^{6}-14x^{4}+49x^{2}-36}{x^{4}+4x^{3}-x^{2}-16x-12 }$
$b)T=$$\frac{x^{6}-y^{6}}{x^{6}+2x^{4} y^{2} +2x^{2}y^{4}+ y^{6} }$
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Toán Lớp 8: Rút gọn phân thức sau:
$a)S=$$\frac{x^{6}-14x^{4}+49x^{2}-36}{x^{4}+4x^{3}-x^{2}-16x-12 }$
$b)T=$$\frac{x^{6}-y^{6}}{x^{6}+2x^{4} y^{2} +2x^{2}y^{4}+ y^{6} }$
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