Explain why the polynomial can be factorised over the integers

MATHEMATICS · Subjective · CBSE · Mathematics · Quadratic Equations · Quadratic Equations

Problem

Explain why the polynomial x2+4x+3x^2 + 4x + 3 can be factorised over the integers, whereas the polynomial x2+4x+5x^2 + 4x + 5 cannot.

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