十字相乘法:6x²+x-1 35a²b²+9ab-2 -15x²+11x-2
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![十字相乘法:6x²+x-1 35a²b²+9ab-2 -15x²+11x-2](/uploads/image/z/1635724-28-4.jpg?t=%E5%8D%81%E5%AD%97%E7%9B%B8%E4%B9%98%E6%B3%95%EF%BC%9A6x%26%23178%3B%2Bx-1+35a%26%23178%3Bb%26%23178%3B%2B9ab-2+-15x%26%23178%3B%2B11x-2)
十字相乘法:6x²+x-1 35a²b²+9ab-2 -15x²+11x-2
十字相乘法:6x²+x-1 35a²b²+9ab-2 -15x²+11x-2
十字相乘法:6x²+x-1 35a²b²+9ab-2 -15x²+11x-2
:6x²+x-1=(3x-1)(2x+1)
35a²b²+9ab-2 =(7ab-1)(5ab+2)
-15x²+11x-2=-(15x^2-11x+2)=-(3x-1)(5x-2)
6x²+x-1
=(2x+1)(3x-1)
35a²b²+9ab-2
=(7ab-1)(5ab+2)
-15x²+11x-2
=-(3x+1)(5x+2)