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| 1. |
a²(b+c)+b²(c+a)+c²(a+b)-2b²c |
| Answer» a2(b+ c) + b2(c + a) + c2 (a+ b) - 2b2c= a2b + a2c + b2c + b2a + c2a + c2b - 2b2c= a2b + a2c + b2c - 2b2c + b2a + c2a + c2b= a2b + a2c - b2c + b2a + c2a + c2b\xa0 | |