victoriabeltecas
victoriabeltecas
29-05-2024
Mathematics
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X^2 minus 14x minus 15
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miron66
miron66
29-05-2024
X^2-14x-15=0
D=b^2-4ac=(-14)^2-4•1•(-15)=196+60=256
X1= -b + the root of D / 2a = 14 + 16 / 2 = 15
X2 = -b - the root of D / 2a = 14 - 16 / 2 = -1
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