Question

what should be added to 1 - x square to get the sum 2 x square - 2​

Answer 1

Answer:

HERE YOU GO

Step-by-step explanation:

The expression Σ(x i - x̄) 2 = (x 1 - x̄) 2 + (x 2 - x̄) 2 + (x 3 - x̄) 2. We now use the fact from basic algebra that (a + b) 2 = a 2 +2ab + b 2 . This means that (x 1 - x̄) 2 = x 1 2 -2x 1 x̄+ x̄ 2 .

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