\(2x^3-7x^2+4x+1=0\)
\(\Leftrightarrow2x^2\left(x-1\right)-5x\left(x-1\right)-\left(x-1\right)=0\)
\(\Leftrightarrow\left(x-1\right)\left(2x^2-5x-1\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=1\\2x^2-5x-1=0\end{cases}}\) Đến đây tự làm tiếp nha
GPT :
\(2x^2+7x+1+\left(2x-1\right)\sqrt{x^2+1}=0\)
GPT :
\(x^3-4x^2+5x-1-\sqrt{2x-3}=0\)
GPT: x3+7x2+6x+1=4x2+3x
GPT:
1, \(6x^2+10x-92+\sqrt{\left(x+70\right)\left(2x^2+4x+16\right)}=0\)
2,\(x+3+\sqrt{1-x^2}=3\sqrt{x+1}+\sqrt{1-x}\)
GPT: x4 -2x2 +7x-12=0
Bài 1 : giải những các phương trình sau A. X² - 2x - 3 = 0 B. X² - 3x = 0 C. X² - 4x - 5 = 0 D. 5x² + 2x - 7 = 0 E. 2x² - 8 = 0 G. 3x² -7x + 1 = 0 H. X² - 4x + 1 = 0
GPT \(2x+3+\sqrt{4x^2+9x+2}=2\sqrt{x+2}+\sqrt{4x+1}\)
GPT:
1/ \(\sqrt{7x^2+20x-86}+x\sqrt{31-4x-x^2}=x+1\)
2/ \(\sqrt[3]{\frac{12x^2+12x+9}{4}}=x+\sqrt[4]{\frac{4x^3-2}{3}}\)
GPT : \(^{X^3+8X^2+4X}+5\sqrt{\left(2X-1\right)^{^3}}\)
