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a²+2ab+b²= (6²)+2 (6x-1)+-1
=36+2(-6)+-1
=36-12-1
=23
b. 2a + 2a pangkat 2b pangkat 2
c. 3a pangkat 2 - 2b +ab
3a²-2(-1)+(6x-1)
=3(36)+2-6
=108-4
=104