Question

step by step explanation plz​

Answer 1

a) 9√2

b) 33√7

c) 0

Step-by-step explanation:

$a) \sqrt{2} + 3 \sqrt{2} + 5 \sqrt{2} = 9 \sqrt{2}$

$b)4 \sqrt{3 \times 3 \times 7} + 5 \sqrt{7} - 8 \sqrt{2 \times 2 \times 7}$

= 4×3√7 + 5√7 + 8×2√7 = 12√7 + 5√7 + 16√7=33√7

$c) \sqrt{3 \times 3 \times 5} - 3 \sqrt{2 \times 2 \times 5} + 3 \sqrt{5}$

= 3√5 - 3×2√5 + 3√5 = 6√5 - 6√5 =0

Answer 2

Answer:

a) 9√2

b) √7

c) 0

Step-by-step explanation:

refer to the attachment