Advanced Math practice question

Answer: 3

√(50x²) = 5x√2 and √(8x²) = 2x√2, so the difference is 3x√2.

Common wrong answers

If you answered 1

1 uses √50 − √8 as √2.

If you answered 7

7 adds 5 and 2.

If you answered 42

42 subtracts inside the radicals.

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