Làm sao tính. 150/x+10+3×1/4+150/x=10 ra 9x bình -310x-2000 Đọc rõ kỹ nha Cần gấp 30/08/2021 Bởi Margaret Làm sao tính. 150/x+10+3×1/4+150/x=10 ra 9x bình -310x-2000 Đọc rõ kỹ nha Cần gấp
Đề bạn viết ko rõ. $\frac{150}{x}+10+3.\frac{1}{4}+\frac{150}{x}=10$ `=>`$\frac{150}{x}+\frac{13}{4}+\frac{150}{x}=0$ `=>`$\frac{300}{x}+\frac{13}{4}=0$ `=>`$\frac{300}{x}=\frac{-13}{4}$ `=>`$300.4=x.(-13)$ `=>`$1200=x.(-13)$ `=>`$x=\frac{-1200}{13}$ Vậy: $x=\frac{-1200}{13}$ Bình luận
$\dfrac{150}{x+10}+3.\dfrac{1}{4}+\dfrac{150}{x}=10(ĐK:x\neq 10)\\\Leftrightarrow \dfrac{150}{x+10}+\dfrac{3}{4}+\dfrac{150}{x}=10\\\Leftrightarrow \dfrac{150}{x+10}+\dfrac{3}{4}+\dfrac{150}{x}-10=0\\\Leftrightarrow \dfrac{150}{x+10}-\dfrac{37}{4}+\dfrac{150}{x}=0\\\Leftrightarrow \dfrac{600x-37x(x+10)+600(x+10)}{4x(x+10)}=0\\\Leftrightarrow \dfrac{600x-37x^{2}-370x+600x+6000}{4x(x+10)}=0\\\Leftrightarrow \dfrac{830x-37x^{2}+6000}{4x(x+10)}=0\\\Leftrightarrow 830x-37x^{2}+6000=0\\\Leftrightarrow -37x^{2}+830x+6000=0\\\Leftrightarrow 37x^{2}-830x-6000=0\\\Leftrightarrow x=\dfrac{-(-830)±\sqrt{(-830)^{2}-4.37.(-6000)}}{2.37}\\\Leftrightarrow x=\dfrac{830±\sqrt{830^{2}+888000}}{74}\\\Leftrightarrow x=\dfrac{830±\sqrt{10^{2}.(83^{2}+8880)}}{74}\\\Leftrightarrow x=\dfrac{830±\sqrt{10^{2}(6889+8880)}}{74}\\\Leftrightarrow x=\dfrac{830±\sqrt{10^{2}.15769}}{74}\\\Leftrightarrow x=\dfrac{830±10\sqrt{15769}}{74}\Leftrightarrow x=\dfrac{415±5\sqrt{15769}}{37}$Vậy $x=\dfrac{415±5\sqrt{15769}}{37}$ Bình luận
Đề bạn viết ko rõ.
$\frac{150}{x}+10+3.\frac{1}{4}+\frac{150}{x}=10$
`=>`$\frac{150}{x}+\frac{13}{4}+\frac{150}{x}=0$
`=>`$\frac{300}{x}+\frac{13}{4}=0$
`=>`$\frac{300}{x}=\frac{-13}{4}$
`=>`$300.4=x.(-13)$
`=>`$1200=x.(-13)$
`=>`$x=\frac{-1200}{13}$
Vậy: $x=\frac{-1200}{13}$
$\dfrac{150}{x+10}+3.\dfrac{1}{4}+\dfrac{150}{x}=10(ĐK:x\neq 10)\\\Leftrightarrow \dfrac{150}{x+10}+\dfrac{3}{4}+\dfrac{150}{x}=10\\\Leftrightarrow \dfrac{150}{x+10}+\dfrac{3}{4}+\dfrac{150}{x}-10=0\\\Leftrightarrow \dfrac{150}{x+10}-\dfrac{37}{4}+\dfrac{150}{x}=0\\\Leftrightarrow \dfrac{600x-37x(x+10)+600(x+10)}{4x(x+10)}=0\\\Leftrightarrow \dfrac{600x-37x^{2}-370x+600x+6000}{4x(x+10)}=0\\\Leftrightarrow \dfrac{830x-37x^{2}+6000}{4x(x+10)}=0\\\Leftrightarrow 830x-37x^{2}+6000=0\\\Leftrightarrow -37x^{2}+830x+6000=0\\\Leftrightarrow 37x^{2}-830x-6000=0\\\Leftrightarrow x=\dfrac{-(-830)±\sqrt{(-830)^{2}-4.37.(-6000)}}{2.37}\\\Leftrightarrow x=\dfrac{830±\sqrt{830^{2}+888000}}{74}\\\Leftrightarrow x=\dfrac{830±\sqrt{10^{2}.(83^{2}+8880)}}{74}\\\Leftrightarrow x=\dfrac{830±\sqrt{10^{2}(6889+8880)}}{74}\\\Leftrightarrow x=\dfrac{830±\sqrt{10^{2}.15769}}{74}\\\Leftrightarrow x=\dfrac{830±10\sqrt{15769}}{74}\Leftrightarrow x=\dfrac{415±5\sqrt{15769}}{37}$
Vậy $x=\dfrac{415±5\sqrt{15769}}{37}$