A.7x+15 B.7x-15 C.-12x-15 D.-12x+15 5k^2(-6k-2k+6) A.-30k^3+3k^2+30k B.30k^4-10k^3+11k^2 C.-k^4+3k^3+11k^2 D.30k^4-10k^3+30k^2 My answers are b and a please help me
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