十字相乘法还原1.x^2+2x-32.x^2-6x+83.a^2-7a+64.x^2-2x-155.x^2y^2-3xy-286.m^2+8m-97.-z^2+5z-68.p^2-4pq-8q^29.y^1+2ay-63a^210.4x^2+4x-1511.6y^2+y-3512.10m^2-21m+213.8x^2-22x+1514.2x^2-7xy+3y^215.4a^2+28a-72只要有人帮我解出来了,保证追

Question

十字相乘法还原
1.x^2+2x-3
2.x^2-6x+8
3.a^2-7a+6
4.x^2-2x-15
5.x^2y^2-3xy-28
6.m^2+8m-9
7.-z^2+5z-6
8.p^2-4pq-8q^2
9.y^1+2ay-63a^2
10.4x^2+4x-15
11.6y^2+y-35
12.10m^2-21m+2
13.8x^2-22x+15
14.2x^2-7xy+3y^2
15.4a^2+28a-72
只要有人帮我解出来了,保证追加```

Answer 1

1.(x-1)(x+3)
2.(x-2)(x-4)
3.(x-1)(x-6)
4.(x-5)(x+3)
5.(xy+4)(xy-7)
剩下的方法一样.