x²-25/2x²+7x-15 (сократите дробь)

2x^2+7x-15D=b^2-4ac=7^2-4*2*(-15)=49+120=169x_1= \frac{-b+ \sqrt{D} }{2a}= \frac{-7+13}{2*2}= \frac{6}{4}=1,5 x_2= \frac{-b- \sqrt{D} }{2a}= \frac{-7-13}{2*2}=- \frac{20}{4}=-5 \frac{ x^{2} -25}{2(x-1,5)(x+5)} = \frac{ (x -5)(x+5)}{2(x-1,5)(x+5)}= \frac{x+5}{2x-3}