=22000/(1+r)^2-18000 eching

$$= \frac { 22000 } { ( 1 + r ) ^ { 2 } } - 18000$$

Baholash

$$\frac{2000\left(2-18r-9r^{2}\right)}{\left(r+1\right)^{2}}$$

Qisqa yechim qadamlari

Ifodalarni qo‘shish yoki ayirish uchun ularni yoyib, maxrajlarini bir xil qiling. 18000 ni \frac{\left(1+r\right)^{2}}{\left(1+r\right)^{2}} marotabaga ko'paytirish.

$$\frac{22000}{\left(1+r\right)^{2}}-\frac{18000\left(1+r\right)^{2}}{\left(1+r\right)^{2}}$$

\frac{22000}{\left(1+r\right)^{2}} va \frac{18000\left(1+r\right)^{2}}{\left(1+r\right)^{2}} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{22000-18000\left(1+r\right)^{2}}{\left(1+r\right)^{2}}$$

22000-18000\left(1+r\right)^{2} ichidagi ko‘paytirishlarni bajaring.

$$\frac{22000-18000-36000r-18000r^{2}}{\left(1+r\right)^{2}}$$

22000-18000-36000r-18000r^{2} kabi iboralarga o‘xshab birlashtiring.

$$\frac{4000-36000r-18000r^{2}}{\left(1+r\right)^{2}}$$

\left(1+r\right)^{2} ni kengaytirish.

$$\frac{4000-36000r-18000r^{2}}{r^{2}+2r+1}$$

Kengaytirish

$$-\frac{2000\left(9r^{2}+18r-2\right)}{\left(r+1\right)^{2}}$$

Qisqa yechim qadamlari

Ifodalarni qo‘shish yoki ayirish uchun ularni yoyib, maxrajlarini bir xil qiling. 18000 ni \frac{\left(1+r\right)^{2}}{\left(1+r\right)^{2}} marotabaga ko'paytirish.

$$\frac{22000}{\left(1+r\right)^{2}}-\frac{18000\left(1+r\right)^{2}}{\left(1+r\right)^{2}}$$

\frac{22000}{\left(1+r\right)^{2}} va \frac{18000\left(1+r\right)^{2}}{\left(1+r\right)^{2}} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{22000-18000\left(1+r\right)^{2}}{\left(1+r\right)^{2}}$$

22000-18000\left(1+r\right)^{2} ichidagi ko‘paytirishlarni bajaring.

$$\frac{22000-18000-36000r-18000r^{2}}{\left(1+r\right)^{2}}$$

22000-18000-36000r-18000r^{2} kabi iboralarga o‘xshab birlashtiring.

$$\frac{4000-36000r-18000r^{2}}{\left(1+r\right)^{2}}$$

\left(1+r\right)^{2} ni kengaytirish.

$$\frac{4000-36000r-18000r^{2}}{r^{2}+2r+1}$$