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Given, x2 + 5x + 6
= x2 + 2x + 3x + 6
= x(x + 2) + 3(x + 2)
= (x + 2)*(x + 3)
So, x2 + 5x + 6 = (x + 2)*(x + 3)
Given expression is
a square + b square
We can write as a2 + b2