a) \(5x\left(x-4\right)-x^2+16=0\)⇔\(5x^2-20x-x^2+16=0\)
⇔\(4x^2-20x+16=0\)⇔\(\left(2x-5\right)^2-9=0\)
⇔\(\left(2x-8\right)\left(2x-2\right)=0\)⇔\(\left[{}\begin{matrix}x=1\\x=4\end{matrix}\right.\)
b) \(x^2-4x+3=0\)⇔\(x^2-x-3x+3=0\)
⇔\(x\left(x-1\right)-3\left(x-1\right)=0\)⇔\(\left(x-1\right)\left(x-3\right)=0\)
⇔\(\left[{}\begin{matrix}x=1\\x=3\end{matrix}\right.\)
1,\(^{\left(x-4\right)^2-36=0}\)
2,\(\text{(x+8}\text{)}^2=121\)
3,\(\text{ }x^2+8x+16=0\)
Giải hộ mik vs
Tìm x,biết:
a/\(x+5x^2=0\Leftrightarrow......\)
b/\(x+1=\left(x+1\right)^2\Leftrightarrow..........\)
c/\(x^3+x=0\Leftrightarrow.......\)
d/\(5x\left(x-2\right)-\left(2-x\right)=0\)
e/\(x\left(2x-1\right)+\frac{1}{3}-\frac{2}{3}x=0\Leftrightarrow........\)
g/\(x\left(x-4\right)+\left(x-4\right)^2=0\Leftrightarrow.....\)
h/\(x^2-3x=0\Leftrightarrow.....\)
i/\(4x\left(x+1\right)=8\left(x+1\right)\Leftrightarrow.....\)
tìm x biết
a) \(x^2-2x-3=0\)
b) \(2x^2+5x-3=0\)
c) \(x^4-27x=0\)
d) \(2x\left(x-3\right)-\left(3-x\right)=0\)
e)\(x^2-9=2\left(x+3\right)^2\)
f)\(4x^2-4x+1=\left(5-x\right)^2\)
g) \(4x^2-8x+4=2\left(1-x\right)\left(1+x\right)\)
tìm x biết
a)5(x+3)-2x(x+3)=0
b)6x\(\left(x^2-2\right)-\left(2-x^2\right)=0\)
c)\(\left(x+1\right)^2-\left(x+1\right)\left(x-2\right)=0\)
d)\(4x\left(x-2017\right)-x+2017=0\)
e)\(\left(x+4\right)^2-16=0\)
f)\(12x-x^2-36=0\)
Giải và biện luận tham số nghiệm Pt theo tham số m:
a, \(\text{(m - 3)x - 4 = 0}\)
b, \(\text{(m^2 + 1)x + 2 + = 0}\)
c, \(\left(m^2-4\right)x-3=0\)
d, \(\left(m^2-9\right)x+3=m\)
Tìm x, bik
a)\(x^3-x\)=0
b)\(x^3+5x^2+4x+20=0\)
c)\(x^2-25+3\left(x-5\right)^2=0\)
d)2+4\(\sqrt{2x}+4x^2=0\)
a)x(x-5)=4x-20
b)4(x+6)-x\(^3-6x^2=0\)
c)x\(^3-5x^2+x-5=0\)
d)\(x^4-2x^3+10x^2-20x=0\)
e)\(\left(2x-3\right)^2=9\left(x-2^2\right)\)