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akn2000
@akn2000
August 2022
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разложить на множители квадратный трехчлен:
5х^2-13х-6=0
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MarinKa33367
D = b^2 - 4ac
D = (-13)^2 - 4(5)*(-6) = 169 + 120 = 289
Х1 = 13 + 17 / 2*5 = 30/10 = 3
Х2 = 13 - 17/ 2*5 = -4/10 = -2/5
5^2 - 13х - 6 = (х-3)(х+2/5)
2 votes
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GreatFilter
5x²-13x-6=(5x+2)(x-3)
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Answers & Comments
D = (-13)^2 - 4(5)*(-6) = 169 + 120 = 289
Х1 = 13 + 17 / 2*5 = 30/10 = 3
Х2 = 13 - 17/ 2*5 = -4/10 = -2/5
5^2 - 13х - 6 = (х-3)(х+2/5)