Question

13+6√31-6√31+4√31+9 simplify step by step answer​

Answer 1

$13 + 6 \sqrt{31} - 6 \sqrt{31} + 4 \sqrt{31} + 9 \\ = 13 + 9 + (6 - 6 + 4)\sqrt{31} \\ = 22 + 4 \sqrt{31}$

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