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polygon#sum of interior angles of a polygon,how to calculate angles of a polygon@tmath247

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#quadraticequation#howtosolvewordproblemleadingtoquadraticequation@tmath247

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#Quadratic equation#completing the square method#tmath247

10:02

#how to find sum of a geometric progression@tmath247.

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Algebraic process;Solving equation@tmath247

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#quadratic equation#quadritc equation by factorization method#

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#commercialarithmetics#percentageprofit#howtocalculateprofit#@tmath247

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#quadraticequation#how to solve questions on word problem leading to quadratic equation#@tmath247