2y-5 3y+21 ------- = ---------- y+5 2y-1 нужно решить перемножением накрест. Created by dank213. algebra-ru

2y-5 3y+21 ------- = ---------- y+5 2y-1 нужно решить перемно...

dank213 @dank213

August 2022 1 7 Report

2y-5 3y+21

------- = ----------

y+5 2y-1

нужно решить перемножением накрест

Answers & Comments

wavelength

$\frac{2y-5}{y+5} = \frac{3y+21}{2y-1} \\ (2y-5)(2y-1) = (3y+21)(y+5) \\ 4y^2 - 2y -10y + 5 = 3y^2 + 15y + 21y + 105 \\ y^2 - 48y - 100 = 0 \\ D = 2304 + 4\cdot100 = 2704$

$y_1 = \frac{+48+\sqrt{2704}}{2} = \frac{+48+52}{2} = 50$

$y_2 = \frac{+48-52}{2} = -2$

Ответ: 50;-2

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pomogite perevesti ispolzuya passivnyj zalog

sm3 sgorit v dizelnom dvigatele moshnostyu 02 mvt za 4 chasov nepreryvnoj raboty

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v poezde dvizhushemsya ravnomerno pryamolinejno v sisteme otscheta svyazannoj s zemle

pomogite soschitat 9h109h2h10 6

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