Question

Хэлп плез.
0,2√400 - 1/5√625
$sqrt{0,81*36}$
$sqrt{2^{4} * 3^{6} }$
$sqrt{90} *sqrt{10} -frac{sqrt{75} }{sqrt{3} }$

Answer 1

1) 0,2×√400-(1/5)×√625=0,2×20-(1/5)×25=0,2×20-0,2×25=0,2×(20-25)=0,2×(-5)=-1;

2) √((0,81)×36)=√(0,9²×6²)=0,9×6=5,4;

3) √(2⁴×(3^6))=√((2²)²×(3³)²)=(2²×3³)=4×27=108;

4) √90×√10-(√75/√3)=√(90×10)-√(75/3)=√900-√25=√(30)²-√(5)²=30-5=25.