What is the result of the complex multiplication (−2−i)×(3i+6)(-2-i)\times(3i+6), in the form a+bi\textrm{a} + \textrm{b}i? If your answer is irrational or a fraction, please enter it as a decimal representation, accurate to 1dp (e.g., 0.5 instead of 12\frac{1}{2}, 1.4 instead of 2\sqrt{2}, etc.) [Fill in the blank] + [Fill in the blank] i 多项填空题

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类似问题

Let 𝑢 = 1 − 3 𝑖  and  𝑣 = 1 + 𝑖 . Which of the following is the Cartesian form of the complex number 𝑢 + 𝑢 𝑣 ?

设 和 𝑢 = 1 − 3 𝑖 和 𝑣 = 4 + 𝑖 . 以下哪一种是复数 \（u + uv\） 的笛卡尔形式？

Write the complex number 𝑧 = ( 1 + 3 𝑖 ) 16 in standard polar form 𝑧 = 𝑟 ( cos ⁡ 𝜃 + 𝑖 sin ⁡ 𝜃 ) . What are 𝑟 and 𝜃 ?

Let 𝑢 = 1 − 3 𝑖  and  𝑣 = 5 + 𝑖 . Which of the following is the Cartesian form of the complex number 𝑢 + 𝑢 𝑣 ?

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