(2✓392-21)+(√8-7) square =?
please solve my problem
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the answer is 6
STEP BY STEP EXPLANATION
we can write it as
2×7root8-21+8+49-14root8 ( a-b )square
we get
57-21
36
we can write 36 as 6 ( 6×6= 36 or 6 square)
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