Toán Lớp 8: Rút gọn biểu thức:
a) $(x + 2)(x – 3)^{}$ $-^{}$ $(x + 2)^{2}$ $+^{}$ $(x – 3)^{2}$
b) $2x^{3}$ $-^{}$ $(x – 2)^{}$ $(^{}$$x^{2}$ $+ 2x + 4 )^{}$
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Toán Lớp 8: Rút gọn biểu thức:
a) $(x + 2)(x – 3)^{}$ $-^{}$ $(x + 2)^{2}$ $+^{}$ $(x – 3)^{2}$
b) $2x^{3}$ $-^{}$ $(x – 2)^{}$ $(^{}$$x^{2}$ $+ 2x + 4 )^{}$
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