4√75-2√147+√243 tolong dijawab beserta cara mengerjakannya!

4√75 - 2√147 + √243
4√25x3 - 2√49x3 + √81x3
20√3 - 14√3 + 9√3
15√3

[tex]4 \sqrt{75} -2 \sqrt{147} + \sqrt{243} =4 \sqrt{(3)(25)} -2 \sqrt{(3)(49)} + \sqrt{(3)(81)}[/tex]
[tex]=(4)(5) \sqrt{3} -(2)(7) \sqrt{3} +9 \sqrt{3} \\ =20 \sqrt{3} -14 \sqrt{3} +9 \sqrt{3} \\ =15 \sqrt{3}[/tex]