Б) s² + 21s 108 = 0 Г) u² +22u + 120 = 0
21s +108
U²+22u+120=0 u₁=-22+√(484+480) = -22+2 = -10 2 2 u₂=-22-√(484+480) = -22-2 = -12 2 2 s²+21s+108=0 s₁=-21+√(441+432) = -21+3 = -9 2 2 s₂=-21-√(441+432) = -21-3 = -12 2 2
Б) s²+21s+108=0 D=441-432=9 x1= = x2= u) u² +22u + 120 = 0 D=b²-4ac=484-480=4 x1= = x2=