Question

(3|x|+15).(16-x²).(x³+125)=0        GIÚP MÌNH VỚI , GẤP NHÉ , THANK YOU

 

Answer 1

\(\hept{\begin{cases}3|x|+15=0\\16-x^2=0\\x^3+125=0\end{cases}}\)

\(\hept{\begin{cases}3x+15=0\\16-x^2=0\\x^3+125=0\end{cases}}\)

\(\hept{\begin{cases}3x=0-15\\x^2=16-0\\x^3=0-125\end{cases}}\)

\(\hept{\begin{cases}3x=-15\\x^2=16\\x^3=-125\end{cases}}\)

\(\hept{\begin{cases}x=\left(-15\right):3\\x^2=4^2=\left(-4\right)^2\\x^3=-5^3\end{cases}}\)

\(\hept{\begin{cases}x=-5\\x=4=-4\\x=-5\end{cases}}\)