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(2a-2)pangkat 2
=(2a-2) (2a-2)
=[2a.2a]+[2a.-2]-[2.2a]-[2.-2]
=4a^2-4a-4a-4
=4a^2-8a-4
ket:
4a^2 magsudnya 4a pangkat 2 yah maaf hanya bisa jwb satu soal saja