Work out the value of each expression.
1.Find the value of 3(a − b) when a = 2 and b = 3.
2.Find the value of 7(a − b) when a = 3 and b = 5.
3.Find the value of ab − 6 when a = 9 and b = 3.
4.Find the value of 7(a − b) when a = 2 and b = 2.
5.Find the value of 7a² − 8b when a = 5 and b = 5.
6.Find the value of 9(a − b) when a = 4 and b = 3.
7.Find the value of ab − 4 when a = 9 and b = 7.
8.Find the value of a² + b² when a = 7 and b = 4.
9.Find the value of ab − 5 when a = 6 and b = 5.
10.Find the value of 4ab when a = 4 and b = 11.
11.Find the value of a² + 2b when a = 5 and b = 9.
12.Find the value of 7(a + b) when a = 9 and b = 2.
13.Find the value of a² + b² when a = 7 and b = 7.
14.Find the value of 4a² − 5b when a = 1 and b = 5.
15.Find the value of 6a + 8b when a = 12 and b = 1.
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