Question

2.Есептеңіз: 67² −14 * 67 + 72
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Answer 1

$\displaystyle\bf\\67^{2} -14\cdot 67+7^{2} =67^{2} -2\cdot 7\cdot 67+7^{2} =(67-7)^{2} =60^{2} =3600$