(2 \times \sqrt{ 2)(3-5 \sqrt{ 2) } }
Evaluate
6\sqrt{2}-20\approx -11.514718626
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6\sqrt{2}-10\left(\sqrt{2}\right)^{2}
Use the distributive property to multiply 2\sqrt{2} by 3-5\sqrt{2}.
6\sqrt{2}-10\times 2
The square of \sqrt{2} is 2.
6\sqrt{2}-20
Multiply -10 and 2 to get -20.
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