1.222×9-1.332×4用分解因式方法怎么做
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1.222×9-1.332×4
=1.222×9-(1.222+0.11
=1.222(9-4)-1.222×4
=1.222×5-1.222×4
=1.222(5-4)
=1.222
=1.222×9-(1.222+0.11
=1.222(9-4)-1.222×4
=1.222×5-1.222×4
=1.222(5-4)
=1.222
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=(1.22×3)²-(1.33×2)²
=3.66²-2.66²
=(3.66+2.66)(3.66-2.66)
=6.32
=3.66²-2.66²
=(3.66+2.66)(3.66-2.66)
=6.32
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