Try another version of this question Compute: `3[(7,2),(4,1)] + 4[(0,-4),(7,2)]` `[(21,-10),(40,11)]` `[(7,-2),(11,3)]` `[(14,5),(18,10)]` `[(49,-14),(77,21)]` Get help: VideoBox 1: Select the best answer `[(21,-10),(40,11)]`
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Get help: Video
Box 1: Select the best answer