evaluate: 3a² - 5b - 4c, if a = 2, b = -2, and c = 3
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Step-by-step explanation:
a=2 b= -2 c=3
3a^2-5b-4c
=3×(2)^2-5×(-2)-4×3
=3×4+10-12
=12+10-12
=10
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