(k-10)(k-2)
=(k+−10)(k+−2)
=(k)(k)+(k)(−2)+(−10)(k)+(−10)(−2)
=k²−2k−10k+20
=k²−12k+20
¿algo mas?
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(k-10)(k-2)
=(k+−10)(k+−2)
=(k)(k)+(k)(−2)+(−10)(k)+(−10)(−2)
=k²−2k−10k+20
=k²−12k+20
¿algo mas?