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Mathematics

Grade-7

Easy

Question

Add/Subtract using the proper rules: 2i + 3 + 7 - 12i

10i - 10
-10i + 10
14i + 10
-10i + 4

hint Hint:

First rearrange and group like terms : terms with i

The correct answer is: -10i + 10

2i + 3 + 7 - 12i
First rearrange
= 2i - 12i + 3 + 7
and group like terms : terms with i
=(2-12)i + 10
= -10i + 10

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