Question

因式化解.Y2+Y+4/1,还有几题,进来看看

Answer 1

1.3ax2-3ay2

=3a(x2-y2)

=3a(x+y)(x-y)

2.Y2+Y+4/1

=(Y+1/2)2

3.1-36b2

=(1+6b)(1-6b)

4.2xy-x2-y2

=-(x2-2xy+y2)

=-(x-y)2

5.(a+b)2-12(a+b)+36

=(a+b-6)2