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mishakok266
@mishakok266
October 2021
1
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Выделить полный квадрат: х^2+ 4х
Там где ^ - степень
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MandarinkaToDay
x^2+4x= (x^2+2*2*x+2^2)-2^2=(x+2)^2-4
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x^2+4x= (x^2+2*2*x+2^2)-2^2=(x+2)^2-4