Как решить без калькулятора (√20+√45)*√5

Question

user_23115265 · Accepted Answer

(√20+√45)*√5
√20*√5 + √45*√5 = √20*5 + *√45*5 = *√100 + *√225 = 10 + 15 = 25

rustam_rozyyew_1 · Answer

(√20+√45)*√5=(√20*√5+√45*√5)=(√20*5+√45*5)=10+15=25

timofei_482 · Answer

√20= 2√5
√45=3√5
2√5+3√5=5√5 
5√5*√5=5*5=25 ответ 25

bato_dambaev_15 · Answer

(sqrt(4*5)+sqrt(9*5))*sqrt(5) = (2*sqrt(5)+3*sqrt(5))*sqrt(5) = 5 * sqrt (5) * sqrt (5) = 5 * 5 = 25