Question

Помогите срочно! 1 и 2

Answer 1

$1)2absqrt{a^{6}b } +6a^{4}bsqrt{b}=2ab*a^{3}sqrt{b}+6a^{4}bsqrt{b} =2a^{4}bsqrt{b}+6a^{4}bsqrt{b}=8a^{4}bsqrt{b}$

$2)sqrt{10}(sqrt{90}-2sqrt{45}+sqrt{125})+5sqrt{2}=sqrt{10}(sqrt{9*10}-2sqrt{9*5}+sqrt{25*5})+5sqrt{2} =sqrt{10}(3sqrt{10}-2*3sqrt{5}+5sqrt{5})+5sqrt{2}=sqrt{10}(3sqrt{10} -sqrt{5})+5sqrt{2}=sqrt{10}*3sqrt{10} -sqrt{10}*sqrt{5}+sqrt{25*2}=3*10-sqrt{50}+sqrt{50} =30$