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=√(64 x 2) –3√(25 x 2) +4√(4 x 2) –3√(9 x 2)
=8√2 –(3 x 5)√2 +(4 x 2)√2 –(3 x 3)√2
=8√2 –15√2 +8√2 –9√2
=–8√2
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