1. 12x^2-5x-2
2. 5x^2+6xy-8y^2
3. x^2-5x+3
4. x^2-2√2X-3
5. 3x^2+4xy-y^2
6. (x^2-2x)^2-7(x^2-2x)+12
谢谢 要有过程!
1. 12x^2-5x-2
2. 5x^2+6xy-8y^2
3. x^2-5x+3
4. x^2-2√2X-3
5. 3x^2+4xy-y^2
6. (x^2-2x)^2-7(x^2-2x)+12
谢谢 要有过程!
1. 12x^2-5x-2
=(4x+1)(3x-2)
2. 5x^2+6xy-8y^2
=(5x-4y)(x+2y)
3. x^2-5x+3
=(x-5/2-√13/2)(x-5/2+√13/2)
4. x^2-2√2X-3
=(x-√2-√5)(x-√2+√5)
5. 3x^2+4xy-y^2
=3[x+(2-√7)y/3)[x+(2+√7)y/3]
6. (x^2-2x)^2-7(x^2-2x)+12
=(x^2-2x-3)(x^2-2x-4)
=(x+1)(x-3)(x-1+√5)(x-1-√5)