cara menemukan nilai x? tolong yaa buat tugas besok

x² = 15²+12²
x² = 225 + 144
x² = 369
x = √369
x = √ 9×41
x = 3√41

smg membantu,maaf kl salah..

X^2 = 12^2 + 15^2
X^2 = 144 + 225
X^2 = 369
X = 19,2093737123