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What is the most efficient technique for solving The following equation

What is the most efficient technique for solving The following equation-example-1
User Dom Free
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1 Answer

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7 votes

SOLUTION:

To analyze the method that works best, we look at the last term, i.e c= 21.

+3 and +7 are factors of 21, they also add up to +10 which is also b from the quadratic structure.

Answer: Hence: factoring and zero-product principle is the best method

User Santhosh
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