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(g°f)(-2) = g(f(-2))
=3f(-2)² - 2f(-2) + 5
=3(2x+3)² - 2(2x+3) + 5
=3(2(-2)+3)² - 2(2(-2)+3) + 5
=3(-1)² - 2(-1) + 5
=3 + 2 + 5
= 10
jawabannya B