Factorizing the biggest common factor using common factor method

Go ! $2a+2b = 2(a + b) $ (sum of 2 terms -> productof 2 factors ! $2a+ab = a(2 + b) $ $a^2+a = a^2+1a = a(a+1) $ $a+ab+2ac $ = $a(1+b+2c)$ $x^2-x $ = $x(x-1)$ $a(x-1)+b(x-1) $ = $(x-1)(a+b)$ $a(x-1)+(1-x)b $ = $a(x-1)-(x-1)b = (x-1)(a-b)$ $2a^2b-4ab $ = $2ab(a-2)$

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