<span>0,4+15+(-1,83n)=16+0,4−3,83n
</span><span>15,4 -1,83n=16,4−3,83n
-1,83n+3,83n=16,4-15,4
2n=1
n=1/2=0.5</span>
<span>sqrt(x+1)+x=5</span>
<span><span>sqrt(x+1)=5-x</span></span>
<span><span>x+1=(5-x)^2</span></span>
<span><span>x+1=25-10x-x^2</span></span>
<span><span>x+1-25+10x+x^2=0</span></span>
<span><span>x^2+11x-24=0</span></span>
D=121+4*24=217
x1,2=(11+-sqrt217)/2
=-4аˣ(-5а²)-4аˣ2а-4аˣ(-1)=20а³-8а²+4а
=-3х₃ˣ(2а-3х)=-6ах³+9х⁴