Explanation: First break down the equation y^2 -12y +20. The equation now becomes y^2 -2y -10y +20. This is called creating and using the sum-product pattern. Now you need to find the common factor between both pairs to simplify the next equation, y ( y - 2 ) - 10 ( y- 2 ). ( y - 2 ) is the common factor. Now all you do is rewrite your equation in factored form. In this case, ( y - 10 )( y - 2 ). Comes out to be your answer.
