Question

aflati x din:
x²+12²=13²
2x²+3× 2x+¹+5x 3x=120
e urgent dau coroana​

Answer 1

$x^2+12^2=13^2\\x^2+144=169\\x^2=169-144\\x^2=25\\x1=-5 \\x2=+5$

la al doilea nu se intelege ce ai scris.