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When a equals -3, the expression 3a squared can be written as 3(-3)^2. First, we square -3 to get 9. Then, we multiply 9 by 3 to get the final result of 27. Therefore, 3a squared, when a equals -3, is equal to 27.
3a=1divide both sides by 3a=1/3
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-3a-12 = 12+12 +12-3a = +12~ ~-3 -3a = -8
3a = 21 Therefore, a = 21/3 a = 7
If 3a+5=5a+3, then: 3a+5 - 3a = 5a+3 - 3a 5=2a+3 5 - 3=2a+3 - 3 2=2a a=1