Question

(X^2-10 ):5=3   mn ghi cach giai ra giup em nha

Answer 1

\(\left(x^2-10\right):5=3\\ \Rightarrow x^2-10=3.5\\ \Rightarrow x^2=15+10\\ \Rightarrow x^2=25\\ \Rightarrow\left[{}\begin{matrix}x=-5\\x=5\end{matrix}\right.\)

Answer 2

(x²-10) : 5 = 3

⇔ (x²-10) = 3.5

⇔(x²-10) = 15

⇔x² = 15 + 10

⇔x² = 25

⇔x² = 5²

⇒x = 5

Vậy x = 5