Option 2: 18-5i is the right answer
Step-by-step explanation:
Given

When there is a negative number in radical, a new complex number iota denoted by i is introduced which is equal to 
So we will solve the given expression

Hence,
Option 2: 18-5i is the right answer
Keywords: Iota, complex numbers
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Answer:
true
Step-by-step explanation:
1. simplfy the expression to 7^2 *8/7^3=8/7.
2. that'll give u 8/7=8/7
First expression:
For the first expression, remember that parenthesis have priority over other operations. Inside the parenthesis we have the sum of three terms (once you read it as 5 + (-3) + 2. Since the sum is commutative and associative, you can perform this operations in any way you like.
The expression in the parenthesis evaluates to 4, so we're left with 16(4), which means we have to mulply 16 by 4, and the answer is 64
Second expression:
Here, you must use the fact that multiplications/divisions have higher priority than sums/subtractions, so we must perform that operation first. The multiplication is three times four, so the answer is 12. The expression becomes, as before, the sum of three terms:

x+6+3x=30
x+3x+6= 30 ( combine like terms)
4x+6= 30
move 6 to the other side
sign changes from +6 to -6
4x+6-6= 30-6
4x= 30-6
4x= 24
divide both sides by 4 to get x by itself
4x/4= 24/4
answer:
x= 6
Answer:
5/7
Step-by-step explanation:
3+2 is 5 over the same denominator because that's how many slices of pizza there are