Subtract the complex numbers: (-2 + 12i) - (-1 - 9i)
2 answers:
Answer:
B. -3 + 3i
Step-by-step explanation:
Using the foil method:
-2 - 1 = -3
12i - 9i = 3i
= -3 + 3i
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Answer:
C) -1 +21i
Step-by-step explanation:
For many purposes, "i" can be treated as though it is a variable. Collect terms in the usual way.
(-2 +12i) -(-1 -9i) . . . . given
= -2 +12i +1 +9i . . . . use the distributive property to eliminate parentheses
= (-2+1) +(12i +9i) . . . group like terms
= -1 +21i
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Answer:
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