Question

Add 4√3 - 5√7 and 5√3 + 8√7​

Answer 1

$4 \sqrt{3} - 5 \sqrt{7} + 5 \sqrt{3} + 8 \sqrt{7} \\ = 4 \sqrt{3} + 5 \sqrt{3} - 5 \sqrt{7} + 8 \sqrt{7} \\ = (4 + 5) \sqrt{3} - (5 + 8) \sqrt{7} \\ = 9 \sqrt{3} - 13 \sqrt{7}$

Answer 2

Answer:

9√3 + 3√7

is the correct answer