(x+1)(x+3), x²+4x+3, (x+1)(x+5), x²+6x+5, (x+1)(x+4), x²+5x+4, (x+2)(x+4), x²+6x+8, (x+5)(x+2), x²+7x+10, (x+1)(x+10), x²+11x+10, (x+5)(x+3), x²+8x+15, (x+7)(x+7), x²+14x+49.

Factorising quadratics simplified

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