Ответ:
1. X1 = 2
X2 = 1/9
2.x1 = -1+√(61)/2
x2 = -1-√(61)/2
Объяснение:
1. 9x^2-19х+2=0
D= b^2-4ac = 19^2-72= 361-72= 289
x1= -b+√D/2a = 19 +17/18 = 2
x2 = -b-√D/2a = 19-17/18 = 2/18 = 1/9
2. x^2+x-15=0
D= b^2-4ac = 1+60 = 61
x1 = -b+√D/2a = -1+√61/2
x2= -b-√D/2a = -1-√61/2
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Answers & Comments
Ответ:
1. X1 = 2
X2 = 1/9
2.x1 = -1+√(61)/2
x2 = -1-√(61)/2
Объяснение:
1. 9x^2-19х+2=0
D= b^2-4ac = 19^2-72= 361-72= 289
x1= -b+√D/2a = 19 +17/18 = 2
x2 = -b-√D/2a = 19-17/18 = 2/18 = 1/9
2. x^2+x-15=0
D= b^2-4ac = 1+60 = 61
x1 = -b+√D/2a = -1+√61/2
x2= -b-√D/2a = -1-√61/2