Question

X x X x2=50

Answer 1

\(x\) x \(x\) = 25 = 5x5

\(x\) = 5

Answer 2

\(X\times X\times2=50\\ X\times X=25\)

Ta có: \(5\times5=25\)

Đáp số: \(X=25\)

Answer 3

Ta có: \(x\cdot x\cdot2=50\)

\(\Leftrightarrow x^2=25\)

hay \(x\in\left\{5;-5\right\}\)