[tex]3 \sqrt{12} ( \sqrt{75} - 2 \sqrt{243} ) + 2 \sqrt{128} (3 \sqrt{72} - 5 \sqrt{162} ) = [/tex]
[tex]3 \sqrt{900} - 6 \sqrt{2.916} + 6 \sqrt{9.216} - 10 \sqrt{20.736} = [/tex]
[tex]3 \times 30 - 6 \times 54 + 6 \times 96 - 10 \times 144 = [/tex]
[tex]90 - 324 + 576 - 1440 = [/tex]
[tex]-1.098[/tex]