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Answer:
- 13
Explanation:
a = - 1
b = 2
3a
= 3 x (- 1)
= - 3
5ab
= 5 x (- 1) x 2
= 10 x (- 1)
= - 10
3a + 5ab
= - 3 + (- 10)
= - 13
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