Answer:
Step-by-step explanation:
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Answer
455
(1×1) + 1 = 2
(2×2) + 2 = 6
(6×3) + 3 = 21
(21×4)+4 = 88
(88×5)+5 = 445
x=5
a^+b^=c^
a^+12^=13^
a^+144=169
a^=25
a=square root of 25
a=5
