(4/5x-7/8x):1/x^2 eching

$$( \frac { 4 } { 5 x } - \frac { 7 } { 8 x } ) : \frac { 1 } { x ^ { 2 } }$$

Baholash

$$-\frac{3x}{40}$$

Qisqa yechim qadamlari

Ifodalarni qo‘shish yoki ayirish uchun ularni yoyib, maxrajlarini bir xil qiling. 5x va 8x ning eng kichik umumiy karralisi 40x. \frac{4}{5x} ni \frac{8}{8} marotabaga ko'paytirish. \frac{7}{8x} ni \frac{5}{5} marotabaga ko'paytirish.

$$\frac{\frac{4\times 8}{40x}-\frac{7\times 5}{40x}}{\frac{1}{x^{2}}}$$

\frac{4\times 8}{40x} va \frac{7\times 5}{40x} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{\frac{4\times 8-7\times 5}{40x}}{\frac{1}{x^{2}}}$$

4\times 8-7\times 5 ichidagi ko‘paytirishlarni bajaring.

$$\frac{\frac{32-35}{40x}}{\frac{1}{x^{2}}}$$

32-35 hisob-kitobini qiling.

$$\frac{\frac{-3}{40x}}{\frac{1}{x^{2}}}$$

\frac{-3}{40x} ni \frac{1}{x^{2}} ga bo'lish \frac{-3}{40x} ga k'paytirish \frac{1}{x^{2}} ga qaytarish.

$$\frac{-3x^{2}}{40x}$$

Surat va maxrajdagi ikkala x ni qisqartiring.

$$\frac{-3x}{40}$$

Kengaytirish

$$-\frac{3x}{40}$$

Qisqa yechim qadamlari

Ifodalarni qo‘shish yoki ayirish uchun ularni yoyib, maxrajlarini bir xil qiling. 5x va 8x ning eng kichik umumiy karralisi 40x. \frac{4}{5x} ni \frac{8}{8} marotabaga ko'paytirish. \frac{7}{8x} ni \frac{5}{5} marotabaga ko'paytirish.

$$\frac{\frac{4\times 8}{40x}-\frac{7\times 5}{40x}}{\frac{1}{x^{2}}}$$

\frac{4\times 8}{40x} va \frac{7\times 5}{40x} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{\frac{4\times 8-7\times 5}{40x}}{\frac{1}{x^{2}}}$$

4\times 8-7\times 5 ichidagi ko‘paytirishlarni bajaring.

$$\frac{\frac{32-35}{40x}}{\frac{1}{x^{2}}}$$

32-35 hisob-kitobini qiling.

$$\frac{\frac{-3}{40x}}{\frac{1}{x^{2}}}$$

\frac{-3}{40x} ni \frac{1}{x^{2}} ga bo'lish \frac{-3}{40x} ga k'paytirish \frac{1}{x^{2}} ga qaytarish.

$$\frac{-3x^{2}}{40x}$$

Surat va maxrajdagi ikkala x ni qisqartiring.

$$\frac{-3x}{40}$$