This is from completing the square practice on Khan Academy. Why do we multiply the 2 on the right side? Why not just subtract 121/16.
2026-03-30 10:16:31.1774865791
Why do I have to multiply the 2 on both sides?
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1
Everything inside the parentheses is multiplied by 2, therefore, when bringing something outside the parentheses, it must be multiplied by 2 as well.