<span>√</span><span>3 + </span><span>√</span><span>3= 2*</span><span>√3</span>-------------------------------------<span>
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<span>9аb-3b²\12a²-4ab=3b(3a-b)\4a(3a-b)=3b\4a
Если a=1/3, b=3/5, то 3*3*3/5*4=27/20=1.35</span>
А) -2(3а-b)+6a=-2×3a-2b+6a=6a-2b+6a=12a-2b
б) (m-2n)^2+4mn=(m-2n)(m-2n)+4=4n×2m+4
в) (x-6y)(x+6y)+9(2y)^2=2x+(6-6)+9×4y=2x+36y