\(x^2-25x^4=0\)
=> \(x^2-5^2\left(x^2\right)^2=0\)
=> \(x^2-5^2.x^2.x^2=0\)
=> \(x^2-\left(5x\right)^2.x^2=0\)
=> \(x^2\left(1-\left(5x\right)^2\right)=0\)
=> \(\int^{x^2=0}_{1-\left(5x\right)^2=0}\Rightarrow\int^{x=0}_{\left(5x\right)^2=1}\Rightarrow\int^{x=0}_{\int^{5x=1}_{5x=-1}}\Rightarrow\int^{x=0}_{\int^{x=\frac{1}{5}}_{x=\frac{-1}{5}}}\)
Vậy \(x\in\left\{0;\frac{1}{5};\frac{-1}{5}\right\}\)thì \(x^2-25x^4=0\)
Bạn ơi, dấu \(\int^{ }_{ }\) trong bài là dấu hoặc nha bạn !