jmulligan3 jmulligan3

13-04-2018
Mathematics

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Which polynomial identity will prove 49-5=45

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riyanandola riyanandola

13-04-2018

49 - 4 = 45
7² - 2² = 45
a² - b² = ( a + b ) ( a - b ) - difference of squares
( 7 - 2 ) · ( 7 + 2 ) = 45
5 · 9 = 45
45 = 45
Answer: A ) Difference of Squares

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