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royjonse
@royjonse
August 2022
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Выделите квадрат двучлена из неполного квадратного трехчлена:
а) x^2+4x
б) x^2-6x
в) x^2+7x
г) x^2-x
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Yena
А) x²+4x=(x²+4x+4)-4=(x+2)²-4
б) x²-6x=(x²-6x+9)-9=(x-3)²-9
в) x²+7x=(x²+6x+9)+x-9=(x+3)²+x-9
г) x
²
-x=(x
²-2x+1)+x-1=(x-1)²+x-1
6 votes
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Answers & Comments
б) x²-6x=(x²-6x+9)-9=(x-3)²-9
в) x²+7x=(x²+6x+9)+x-9=(x+3)²+x-9
г) x²-x=(x²-2x+1)+x-1=(x-1)²+x-1