dominic1231
dominic1231
15-03-2017
Mathematics
contestada
Can someone help on these two questions
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CaraHyeona17
CaraHyeona17
15-03-2017
(x-1)(x-1)
=x^2-x-x+1
=x^2-2x+1
(x+7)(x-7)
=x^2-7x+7x-49
=x^2-49
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