|a| = √ 3^2+0^2+(-4)^2 = 5
1) (3m^1/4)²-(n^1/4)²=9m^(1/2)-n^(1/2)=9√m-√n
2) 9a-6√ab+b²
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Возведем все в квадрат:
14+6√5+2√(14+6√5)(14-6√5)+ 14-6√5=28+2√(14²-(6√5)²)=28+2√16=28+2*4=<em><u>36.</u></em>
1
5!(1+6+6*7)/7!(8-1)=49/(7!*7)=7/7!=7/(6!*7)=1/6!
2
12!*1*2*3*4*5*6/(12!*13*14*15*16)=3/25