Mathematics: X+2/x-3 + x-3/x+2 = 5/2

Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence....

X+2/x-3 + x-3/x+2 = 5/2 - id23325214158232, qveenvslayin

dulce129

25.08.2021

$x_{1} =\frac{-17- \sqrt{129}}{2}, x_{2} =\frac{-17+ \sqrt{129}}{2}$

Step-by-step explanation:

$\frac{x + 2}{x + 3} + \frac{x - 3}{x + 2} = \frac{5}{2}$

$\frac{x + 2}{x + 3} + \frac{x - 3}{x + 2} - \frac{5}{2} = 0$

$\frac{2(x + 2 {)}^{2} + 2(x + 3) \times (x - 3) - 5(x + 3) \times (x + 2) }{2(x + 3) \times (x + 2)} = 0$

$\frac{2(x + 2 {)}^{2} + 2( {x}^{2} - 9) + ( - 15x - 15) \times (x + 2) }{2(x + 3) \times (x + 2)} = 0$

$\frac{2( {x}^{2} + 4x + 4) - 3 {x}^{2} - 48 - 25x}{2(x + 3) \times (x + 2)} = 0$

$\frac{2 {x}^{2} + 8x + 8 - 3 {x}^{2} - 48 - 25x }{2(x + 3) \times (x + 2)} = 0$

$\frac{ - {x}^{2} - 17x - 40 }{2(x + 3) \times (x + 2)} = 0$

${x}^{2} + 17x + 40 = 0$

$x = \frac{ - 17± \sqrt{ {17}^{2} - 4 \times 1 \times 40 } }{2 \times 1}$

$x = \frac{ - 17± \sqrt{289 - 160} }{2}$

$x = \frac{ - 17± \sqrt{129} }{2}$

$x_{1} =\frac{-17- \sqrt{129}}{2}, x_{2} =\frac{-17+ \sqrt{129}}{2}$

0,0(0 оценок)