Expand the follow expressions
1. 3(2χ + 1)
2. 2χ(χ - 3)
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(1) 3 ( 2x + 1 )
= 3 * 2x + 3 * 1
= 6x + 3
(2) 2x ( x - 3 )
= 2x * x - 2x * 3
= 2x² - 6x
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