What are grouping factors?

The grouping factors are based on the assumption that all cables in a group are carrying rated current. If a cable is expected to carry no more than 30% of its grouped rated current, it can be ignored when calculating the group rating factor.

What is the formula factor by grouping?

How do you factor by 5 terms by grouping?

Example 1: Factor By Grouping With 5 Terms

We need a product of 2 and a sum of 3 to factor, so we use 1 and 2. So, those last 3 terms factor as: x2 + 3x + 2 = (x + 1)(x + 2): f(x) = x5 + x4 + x2 + 3x + 2 [original function] f(x) = x5 + x4 + (x + 1)(x + 2) [factor x2 + 3x + 2 = (x + 1)(x + 2)]

How do you factor by grouping with 4?