Решите уравнение 24x(x+1)=4x^2-7

Question

Решите уравнение 24x(x+1)=4x^2-7

Answer 1

24х( Х + 1 ) = 4х^2 - 7
24х^2 + 24х - 4х^2 + 7 = 0
20х^2 + 24х + 7 = 0
D = 576 - 560 = 16 = 4^2
X1 = ( - 24 + 4 ) : 40 = - 0,5
X2 = ( - 24 - 4 ) : 40 = - 28/40 = - 0,7

Answer 2

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