Question 75

For integers a and b, if
$$a \triangle b = (a + b - 3)^2 + 1$$ then $$(1 \triangle 2)\triangle(1 \triangle 2) =$$

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For integers a and b, if$$a \triangle b = (a + b - 3)^2 + 1$$ then $$(1 \triangle 2)\triangle(1 \triangle 2) =$$