Question

a) √7+2√7+5√7

b)3√5-5√5+6√5-√5 please show the method it is very important​​

Answer 1

Step-by-step explanation:

$\sf\huge\red{\underbrace{Answer :}}$

$(1) \: \: \: \sqrt{7} + 2 \sqrt{7} + 5 \sqrt{7} = 8 \sqrt{7}$

$(2) \: \: 3 \sqrt{5} - 5 \sqrt{5} + 6 \sqrt{5} - \sqrt{5} = - 2 \sqrt{5} + 5 \sqrt{5} = 3 \sqrt{5}$

hence proved

Answer 2

3√5+√5-√5

answer=. 3√5