АВ = 4см, ВС = 4см. АВ+ВС =8см. 14-8=6 , Значит АС = 6 см. P=4+4+6=14cm.
logp(x<span>^2+2x+3x)=logp(6)</span>
<span>x<span>^2+5x=6</span></span>
<span><span>x<span>^2+5x-6=0</span></span></span>
<span><span><span>(x+6)(x-1)=0</span></span></span>
<span><span><span>x=-6</span></span></span>
<span><span><span>x=1</span></span></span>