*x2 − 2x + 1 = (x − 1)2*2x2 − 6x + 9 = (x − 3)2*3x2 − 20x + 100 = (x − 10)2*4x2 + 10x + 25 = (x + 5)2*4x2 - 20xy + 25y2= (2x-5y)2*5x2 + 14x +49 = (x + 7)2*x2 + 6x + 9 = (x + 3)2*x2 + 2x + 1 = (x + 1)2*x2 + 10x + 25=(x + 5)2*49y2 + 14y + 1=(7y + 1)2
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*x2 − 2x + 1 = (x − 1)2
*2x2 − 6x + 9 = (x − 3)2
*3x2 − 20x + 100 = (x − 10)2
*4x2 + 10x + 25 = (x + 5)2
*4x2 - 20xy + 25y2= (2x-5y)2
*5x2 + 14x +49 = (x + 7)2
*x2 + 6x + 9 = (x + 3)2
*x2 + 2x + 1 = (x + 1)2
*x2 + 10x + 25=(x + 5)2
*49y2 + 14y + 1=(7y + 1)2