If x ^ 2-3x + a can be factorized in the range of integers, then a can be
0, 2, - 4, - 10, - 18 - 28, etc
Find the square of factorization factor (A's square + 9) - 36a's Square
(a²+9)²-36a²
=(a²+9+6a)(a²+9-6a)
=(a+3)²(a-3)²
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Factorization of square-9 of X
The square of X-9
=(x-3)(x+3)
Square difference formula
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