计算 (x-3)²-x+3
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计算 (x-3)²-x+3
第二题 (2a²-3b²+2)(2-2a²+3b²)
第二题 (2a²-3b²+2)(2-2a²+3b²)
![计算 (x-3)²-x+3](/uploads/image/z/5432609-65-9.jpg?t=%E8%AE%A1%E7%AE%97+%28x-3%29%26%23178%3B-x%2B3)
(x-3)²-x+3
= (x-3)²-(x-3)
= (x²-6x+ 9 -1 ) ( x-3)
= (x² -6x + 8 ) (x-3)
= (x -4 ) (x-2 ) (x-3 )
(2a²-3b²+2)(2-2a²+3b²)
= [2 + (2a²-3b²)] [2 - (2a²-3b²)]
= 2 ² - (2a²-3b²) ²
= 4 - 4a^4 - 9b^4 + 12a²b²
= (x-3)²-(x-3)
= (x²-6x+ 9 -1 ) ( x-3)
= (x² -6x + 8 ) (x-3)
= (x -4 ) (x-2 ) (x-3 )
(2a²-3b²+2)(2-2a²+3b²)
= [2 + (2a²-3b²)] [2 - (2a²-3b²)]
= 2 ² - (2a²-3b²) ²
= 4 - 4a^4 - 9b^4 + 12a²b²