X²+9х+14=0<span>
х</span>₁+х₂=-9 х₁=-7
х₁*х₂=14 ⇒ х₂=-2
<span>
Х</span>²+5bx+6b²<span>=0
</span>х₁+х₂=-5b х₁=-3b
х₁*х₂=6b² ⇒ х₂=-2b
<span>
X2+(</span>√2+√6)х+2√<span>3=0
</span> х₁+х₂=-(√2+√6) х₁=-√2
х₁*х₂=2√3 ⇒ х₂=-√6
А) -у=6,3
у=-6,3
б) -х=-11,7
х=11,7
в) \у\=5
у=5 и у=-5
<span>5/8х-(1/4х-1/12у)+1/3=5/8x-2/8x+1/12y+1/3=3/8x+1/12y+1/3</span>