Just factor. y = (x-1)(x-1)
Answer: $270
Step-by-step explanation:
I = prt
I = 0.18 x 750 x 2
I = 135 X 2
I = 270
You add/subtract complex numbers simply by adding/subtracting real parts and imaginary parts.
So, the real part of this sum is the sum of the real parts:

And the imaginary part of this sum is the sum of the imaginary parts:

So, you have

2 flowers are 5.5 feet tall and 4 are 7 feet tall, you subtract 2 from 4 and get 2.
2 flowers is the answer.
UwU