Question

Exercitile 1 si 2 ; Cine raspunde primul si corect ii dau COROANA !
Multumesc !

Answer 1

1 a)
$25\sqrt{10}*4 \sqrt{5}=100* \sqrt{50}=500 \sqrt{2}$
b)
$1.a)\sqrt{5}*5* 5\sqrt{5}=25*5=125 \\ \\ 2. a)2^{2}*5- 5^{2}*2=20-50=-30$
2b
$-5 \sqrt{2}(2 \sqrt{5}+5 \sqrt{2})+4*2+10 \sqrt{10}=-10 \sqrt{10}-50+20+10 \sqrt{10} \\ =-50+20=-30$

Answer 2

1. a) (25√10) * 4√5 = 100√50 = 100 * 5√2 = 500√2
    b) √5(√5)² * (√5)³ = 5√5 * 5√5 = 25 * 5 = 125
2. a) (2√5)² - (5√2)² = 4 * 5 - 25 * 2 = 20 - 50 = - 30
    b) - 5√2 * (2√5 + 5√2) + 2√5 * (2√5 + 5√2) = 
        - 10√10 - 25 * 2 + 4 * 5 + 10√10 =
        - 50 + 20 = 
        - 30