Baholash
\frac{x^{2}-2x-9}{\left(x-2\right)\left(x+7\right)}
Kengaytirish
\frac{x^{2}-2x-9}{\left(x-2\right)\left(x+7\right)}
Grafik
Baham ko'rish
Klipbordga nusxa olish
\frac{x+1}{x+7}-\frac{1}{x-2}
Surat va maxrajdagi ikkala x ni qisqartiring.
\frac{\left(x+1\right)\left(x-2\right)}{\left(x-2\right)\left(x+7\right)}-\frac{x+7}{\left(x-2\right)\left(x+7\right)}
Ifodalarni qo‘shish yoki ayirish uchun ularni yoyib, maxrajlarini bir xil qiling. x+7 va x-2 ning eng kichik umumiy karralisi \left(x-2\right)\left(x+7\right). \frac{x+1}{x+7} ni \frac{x-2}{x-2} marotabaga ko'paytirish. \frac{1}{x-2} ni \frac{x+7}{x+7} marotabaga ko'paytirish.
\frac{\left(x+1\right)\left(x-2\right)-\left(x+7\right)}{\left(x-2\right)\left(x+7\right)}
\frac{\left(x+1\right)\left(x-2\right)}{\left(x-2\right)\left(x+7\right)} va \frac{x+7}{\left(x-2\right)\left(x+7\right)} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.
\frac{x^{2}-2x+x-2-x-7}{\left(x-2\right)\left(x+7\right)}
\left(x+1\right)\left(x-2\right)-\left(x+7\right) ichidagi ko‘paytirishlarni bajaring.
\frac{x^{2}-2x-9}{\left(x-2\right)\left(x+7\right)}
x^{2}-2x+x-2-x-7 kabi iboralarga o‘xshab birlashtiring.
\frac{x^{2}-2x-9}{x^{2}+5x-14}
\left(x-2\right)\left(x+7\right) ni kengaytirish.
\frac{x+1}{x+7}-\frac{1}{x-2}
Surat va maxrajdagi ikkala x ni qisqartiring.
\frac{\left(x+1\right)\left(x-2\right)}{\left(x-2\right)\left(x+7\right)}-\frac{x+7}{\left(x-2\right)\left(x+7\right)}
Ifodalarni qo‘shish yoki ayirish uchun ularni yoyib, maxrajlarini bir xil qiling. x+7 va x-2 ning eng kichik umumiy karralisi \left(x-2\right)\left(x+7\right). \frac{x+1}{x+7} ni \frac{x-2}{x-2} marotabaga ko'paytirish. \frac{1}{x-2} ni \frac{x+7}{x+7} marotabaga ko'paytirish.
\frac{\left(x+1\right)\left(x-2\right)-\left(x+7\right)}{\left(x-2\right)\left(x+7\right)}
\frac{\left(x+1\right)\left(x-2\right)}{\left(x-2\right)\left(x+7\right)} va \frac{x+7}{\left(x-2\right)\left(x+7\right)} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.
\frac{x^{2}-2x+x-2-x-7}{\left(x-2\right)\left(x+7\right)}
\left(x+1\right)\left(x-2\right)-\left(x+7\right) ichidagi ko‘paytirishlarni bajaring.
\frac{x^{2}-2x-9}{\left(x-2\right)\left(x+7\right)}
x^{2}-2x+x-2-x-7 kabi iboralarga o‘xshab birlashtiring.
\frac{x^{2}-2x-9}{x^{2}+5x-14}
\left(x-2\right)\left(x+7\right) ni kengaytirish.
Misollar
Ikkilik tenglama
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometriya
4 \sin \theta \cos \theta = 2 \sin \theta
Chiziqli tenglama
y = 3x + 4
Arifmetik
699 * 533
Matritsa
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simli tenglama
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differensatsiya
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Oʻngga
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Chegaralar
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}