Toán Lớp 8: Bài 1:Tính
a, $x^{2}$($x$-2$x^{3}$) b,($x$+1)(5-$x$) c,($x$-2)($x^{2}$+3$x$-4)
d,($x$-2)($x$-$x^{2}$+4) e,($x^{2}$-1)($x^{2}$+2$x$) f,(2$x$-1)(3$x$+2)(3-$x$)
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Toán Lớp 8: Bài 1:Tính
a, $x^{2}$($x$-2$x^{3}$) b,($x$+1)(5-$x$) c,($x$-2)($x^{2}$+3$x$-4)
d,($x$-2)($x$-$x^{2}$+4) e,($x^{2}$-1)($x^{2}$+2$x$) f,(2$x$-1)(3$x$+2)(3-$x$)
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