因式分解:(x²-3x+2)(x²-3x-4)-72(提示:将x²-3x或x²-3x+2看成整体)要过程呀要按提示做呀

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因式分解:(x²-3x+2)(x²-3x-4)-72(提示:将x²-3x或x²-3x+2看成整体)要过程呀要按提示做呀
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因式分解:(x²-3x+2)(x²-3x-4)-72(提示:将x²-3x或x²-3x+2看成整体)要过程呀要按提示做呀
因式分解:(x²-3x+2)(x²-3x-4)-72
(提示:将x²-3x或x²-3x+2看成整体)
要过程呀
要按提示做呀

因式分解:(x²-3x+2)(x²-3x-4)-72(提示:将x²-3x或x²-3x+2看成整体)要过程呀要按提示做呀
(x²-3x+2)(x²-3x-4)-72
=(x²-3x+2)((x²-3x+2)-6)-72
=(x²-3x+2)(x²-3x+2)-6(x²-3x+2)-72
=(x²-3x+2-12)(x²-3x+2+6)
=(x²-3x-10)(x²-3x+8)