3√75 + 4√12 - 5√58 =

[tex] = 3 \sqrt{75} + 4 \sqrt{12} - 5 \sqrt{48} \\ = 3 \sqrt{25 \times 3} + 4 \sqrt{4 \times 3} - 5 \sqrt{16 \times 3} \\ = 15 \sqrt{3} + 8 \sqrt{3} - 20 \sqrt{3} \\ = (15 + 8 - 20) \sqrt{3} \\ = 3 \sqrt{3} [/tex]

3√3.25 + 4√3.4 - 5√3.16
= 3.5√3 + 4.2√3 - 5.4√3
=15√3 + 8√3 - 20√3
=4√3