Вправи: 152

152. Виконайте множення:

1) m2- 3m7 • x2m-6 = mm-3 • x7 • 2(m-3) = mx14;

2)5ax2+ xy • x15 = 5axxx+y • 15 = a3(x+y);

3) a-b16m2 • 24mb-a = a-b • 24m-16m2(a-b) = –32m;

4) x2- y25pc • 20pcx-y = x-yx+y • 20pc5pc • (x-y) = 4(x+y)1 = 4)x + y);

5) 3a-3b12x • (–18xmb- ma) = – 3a- b • 18x12x • (-ma- b) = 9x2m;

6) m2-2mn+ n2pc • p2m2- mn = (m- n)2• p2pc • m(m- n) = (m- n)pcm.