$\sqrt{7x^2+20x-86}+x\sqrt{31-4x-x^2}=x+1$ = $\sqrt{7x^2+20x-86}+x\sqrt{31-4x-x^2}=x+1$
$\sqrt{7x^2+20x-86}+x\sqrt{31-4x-x^2}=x+1$ = $\sqrt{7x^2+20x-86}+x\sqrt{31-4x-x^2}=x+1$
$\sqrt{7x^2+20x-86}+x\sqrt{31-4x-x^2}=x+1$
câu 1:\(\sqrt{7x^2+20x-86}+x\sqrt{31-4x-x^2}=x+1\)
câu 2:\(\sqrt[3]{\frac{12x^2+12x+9}{4}}=x+\sqrt[4]{\frac{4x^3-2}{3}}\)
GPT:
1/ \(\sqrt{7x^2+20x-86}+x\sqrt{31-4x-x^2}=x+1\)
2/ \(\sqrt[3]{\frac{12x^2+12x+9}{4}}=x+\sqrt[4]{\frac{4x^3-2}{3}}\)
\(\sqrt{x+2\sqrt{x-1}}=2\)
\(\sqrt{4x^2-20x+25}+2x=5\)
\(\sqrt{2x^2-3}=\sqrt{4x-3}\)
\(\sqrt{x^2-x-6}=\sqrt{x-3}\)
\(\sqrt{x^2-x}=\sqrt{3-x}\)
giải phương trình
a) 1+\(\sqrt{x^2+7x+10}\)=\(\sqrt{x+5}\)+\(\sqrt{x+2}\)
b) \(\sqrt{4x^2-2x+\dfrac{1}{4}}\)=\(4x^3\)-\(x^2\)+8x-2
Giải PT:
a) x2 - x - 2\(\sqrt{1+16x}\) = 2
b) x2 - 20x + 24 + 8\(\sqrt{3\left(x-1\right)}\) = 0
c) (4x + 2) \(\sqrt{x+8}\) = 3x2 + 7x + 8
d) x2 + 2x = 4 - 4\(\sqrt{x+3}\)
5. giải phương trình
a.\(\sqrt{\left(x-3\right)^2}=3-x\)
b.\(\sqrt{4x^2-20x+25}+2x=5\)
c.\(\sqrt{1-12x+36x^2}=5\)
Cho \(x=\frac{23}{\sqrt{31+12\sqrt{3}}}\)
tính giá trị của biểu thức : \(P=\frac{x^4+5x^3-20x^2-27x+30}{x^2+4x-21}\)
cần gấpp ạ thanks mnn
a)\(\sqrt{X^2-3X+2}=3-X\)
b)\(\sqrt{4x^2-20x+25}+2x=5\)
c)\(\sqrt{\left(3-2x\right)^2}=4\)