Question

Уравнения.

x²-5x+6=0

x²-7x+10=0

y²+8y+16=0

y²-10y+25=0

Answer 1

X^2 - 5X + 6 = 0 
D = 25 - 24 = 1 ; √ D = 1 
X1 = ( 5 + 1 ) : 2 = 3 
X2 = ( 5 - 1 ) : 2 = 2 
Ответ 3 и 2 
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X^2 - 7X + 10 = 0 
D = 49 - 40 = 9 ; √ D = 3 
X1 = ( 7 + 3 ) : 2 = 5 
X2 = ( 7 - 3 ) : 2 = 2 
Ответ 5 и 2 
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Y^2 + 8Y + 16 = 0
D = 64 - 64 = 0 
Y = ( - 8 ) : 2 = ( - 4 )
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Y^2 - 10Y + 25 = 0 
D = 100 - 100 = 0 
Y = 10 : 2 = 5