2=k*6
k = 2/6 = 1/3
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<span>(x-9)(x+9)= X( в квадрате)*81</span>
(√5-√3)²+2√15= 5-2√15+3+2√15= 8
1) 33,6n-35n=-(35-33,6)n=-1,4n=-1,4*10=-14;
2) 78 1/9m-76 3/8m=(2 1/9-3/8)m=(1 10/9-3/8)m=(1 80/72-27/72)m=
1 53/72m=(125/72)*(24/25)=(5*24)/72=(5*3)/9=5/3=1 2/3
3) -14+1 2/3=-(14-1 2/3)=-12 1/3