You can put this solution on YOUR website! (2 - 5 square root 2)
(4 + 7 square root 2) MULTIPLY.
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8-20SQRT2+14SQRT2-35*2 COMBINE THE SQRT TERMS.
8-6SQRT2-70 COMBINE THE INTERGERS.
-62-6SQRT2 REDUCE THE INTEGERS.
-2(31+3SQRT2) ANS.