Question

$x^{2} -6x+9=25$ cum se face ?

Answer 1

x^2-6x+9=25
x^2-6x-16=0

delta=b^2-4ac=36+64=100

x1=(-b - rad delta)/2a=(6-10)/2=-4/2=-2

x2=(-b+rad delta)/2a=(6+10)/2=16/2=8

s:{-2,8}