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Let’s check out your problem:

Express your answer in the form (a+bi).

(18−40i)−(−9+2i)= (18-40 i)-(-9+2 i)= \newlineExpress your answer in the form (a+bi) (a+b i) .

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Add, subtract, multiply, and divide complex numbersright chevron icon

Full solution

Q. (18−40i)−(−9+2i)= (18-40 i)-(-9+2 i)= \newlineExpress your answer in the form (a+bi) (a+b i) .
  1. Given expression: We are given the expression 4×5i4 \times 5i and we need to simplify it. To do this, we multiply the real number 44 by the imaginary number 5i5i.
  2. Perform multiplication: Perform the multiplication by multiplying the real part by the imaginary part. 4×5i=20i4 \times 5i = 20i
  3. Simplify the expression: Since there is no real part in the product, the real part is 00. Therefore, the expression in the form (a+bi)(a+bi) is 0+20i0 + 20i.

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3⋅(3+20i)= 3 \cdot(3+20 i)= \newlineYour answer should be a complex number in the form a+bi a+b i where a a and b b are real numbers.
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