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Marcylik
@Marcylik
July 2022
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Разложите на множители 81 - a^2 - 14a - 49
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ShirokovP
Verified answer
81 - а^2 - 14а - 49 = 81 - ( а^2 + 14а + 49 ) = 9^2 - ( а + 7 )^2 = ( 9 - а - 7 )•( 9 + а + 7 ) = ( 2 - а )•( 16 + а )
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Verified answer
81 - а^2 - 14а - 49 = 81 - ( а^2 + 14а + 49 ) = 9^2 - ( а + 7 )^2 = ( 9 - а - 7 )•( 9 + а + 7 ) = ( 2 - а )•( 16 + а )