x/(4x^2 + 16x + 15) + x/(4x^2 + 4x - 3) = 0
ОДЗ 4x^2 + 16x + 15 ≠ 0
D=16^2 - 4*4*15 = 256 - 240 = 16
x12 ≠ (-16 +- 4)/8 = - 5/2 -3/2
4x^2 + 4x - 3 ≠ 0
D= 16 + 4*4*3 = 16 + 48 = 64
x12≠ (-4 +- 8)/8 = -3/2 1/2
x*(1/(4x^2 + 16x + 15) + 2/(4x^2 + 4x - 3)) = 0
x = 0
приводим к общему знаменателю
[(4x^2 + 4x - 3)+ (4x^2 + 16x + 15)]/(4x^2 + 4x - 3)(4x^2 + 16x + 15) = 0
8x^2 + 20x + 12 = 0
2x^2 + 5x + 3 = 0
D=25 - 4*2*3 = 25 - 24 = 1
x12 = (-5 +- 1)/4 = -3/2 -1
-3/2 нет по ОДЗ
х=-1 корень
Ответ -1 и 0
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Verified answer
x/(4x^2 + 16x + 15) + x/(4x^2 + 4x - 3) = 0
ОДЗ 4x^2 + 16x + 15 ≠ 0
D=16^2 - 4*4*15 = 256 - 240 = 16
x12 ≠ (-16 +- 4)/8 = - 5/2 -3/2
4x^2 + 4x - 3 ≠ 0
D= 16 + 4*4*3 = 16 + 48 = 64
x12≠ (-4 +- 8)/8 = -3/2 1/2
x*(1/(4x^2 + 16x + 15) + 2/(4x^2 + 4x - 3)) = 0
x = 0
приводим к общему знаменателю
[(4x^2 + 4x - 3)+ (4x^2 + 16x + 15)]/(4x^2 + 4x - 3)(4x^2 + 16x + 15) = 0
8x^2 + 20x + 12 = 0
2x^2 + 5x + 3 = 0
D=25 - 4*2*3 = 25 - 24 = 1
x12 = (-5 +- 1)/4 = -3/2 -1
-3/2 нет по ОДЗ
х=-1 корень
Ответ -1 и 0