Mat Olympiad | How to Solve {(x + 30)^2 - (x + 20)^2} = 50 | Step-by-Step Algebra #mathtricks
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YouTubeThe GK Summit
Mat Olympiad | How to Solve {(x + 30)^2 - (x + 20)^2} = 50 | Step-by-Step Algebra #mathtricks
Need to solve for x but don't want to expand those massive squares? In this video, we tackle the following radical equation: sqrt{(x + 30)^2 - (x + 20)^2} = 50 While it looks like a long calculation, there is a much faster way! By using the algebraic identity for the difference of squares, a^2 - b^2 = (a - b)(a + b) , we can simplify the entire ...
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