Question

bracket 3 root 5 minus 5 root 2 bracket bracket 4 root 5 + 3 root 2 bracket​

Answer 1

$(3 \sqrt{5} - 5 \sqrt{2} )(4 \sqrt{5} + 3 \sqrt{2} \\ = 60 + 9 \sqrt{10} - 20 \sqrt{10} - 30 \\ = 30 - 11 \sqrt{10}$