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प्रश्न
Solve the following quadratic equation by factorisation.
7m2 = 21m
बेरीज
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उत्तर
7m2 = 21m
= 7m2 − 21m = 0
= 7m(m − 3) = 0
= 7m = 0 or m − 3 = 0
= m = 0 or m = 3
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