a)
\(x^2\left(5x-10\right)=0< =>\left[{}\begin{matrix}x^2=0\\5x-10=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=0\\x=2\end{matrix}\right.\)
b)
\(< =>16x\left(x-7\right)-\left(x-7\right)=0< =>\left(x-7\right)\left(16x-1\right)=0< =>\left[{}\begin{matrix}x-7=0\\16x-1=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=7\\x=\dfrac{1}{16}\end{matrix}\right.\)c)
\(\left(3x-2-2x-3\right)\left(3x-2+2x+3\right)=0< =>\left(x-5\right)\left(5x+1\right)=0< =>\left[{}\begin{matrix}x-5=0\\5x+1=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=5\\x=-\dfrac{1}{5}\end{matrix}\right.\)d)
\(x^2-5x-14=0< =>x^2+7x-2x-14=0< =>x\left(x+7\right)-2\left(x+7\right)=0< =>\left(x+7\right)\left(x-2\right)=0< =>\left[{}\begin{matrix}x+7=0\\x-2=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=-7\\x=2\end{matrix}\right.\)
a: =>5x^2(x-2)=0
=>x=0 hoặc x=2
b: =>(x-7)(16x-1)=0
=>x=1/16 hoặc x=7
c: =>(3x-2-2x-3)(3x-2+2x+3)=0
=>(x-5)(5x+1)=0
=>x=5 hoặc x=-1/5
d: =>x^2-5x-14=0
=>(x-7)(x+2)=0
=>x=7 hoặc x=-2
