Question

(2i^3)^2
express in the form a+ib​

Answer 1

Answer:

-4 +0.i

Step-by-step explanation:

Here,

i = √-1

•°•, i^3 = i^2 × i

=> -1×i = -i

therefore, {2×(-i)}^2 = {-2i}^2

or, 4×i^2

or, 4× -1

or, -4.

thus, it can be written as -4 + i×0

where a=-4

b= 0.

please mark as brainliest

Answer 2

Answer:

Answer:

-4 +0.i

Step-by-step explanation:

Here,

i = √-1

•°•, i^3 = i^2 × i

=> -1×i = -i

therefore, {2×(-i)}^2 = {-2i}^2

or, 4×i^2

or, 4× -1

or, -4.

thus, it can be written as -4 + i×0

where a=-4

b= 0.

please mark as brainliest