Problem
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10th-13th gradeOther
Solution
answer user profile imageQanda teacher - Hemanth
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i did it wrong near the last step...

x=-1,2.

answer user profile imageStudent

but

answer user profile imageQanda teacher - Hemanth

yeah?

answer user profile imageStudent

how to solve it by proving

answer user profile imageQanda teacher - Hemanth

what should we prove?