Replace x with 2+i and solve
Remember that i is the square root of -1
My phone automatically capitalizes I, so don’t be confused by that!
y=(2+I)^2 + 3(2+I) +5
y=4+4i-1+6+3i+5
y=7i+14
Is their suppose to be a picture ?
The time taken to get to the 4th can be obtained by dividing the distance given by the speed of the lift.
Distance, height from ground to 4th floor = 42 feets
Time taken to get to the 4th floor = t
Recall :
Time = Distance / speed
- We aren't given the speed of the lift ;
- Assume speed of lift is 7 ft/sec
The time taken to get to the 4th floor will be :
Therefore, to obtain the time taken, divide the distance or height of the 4th floor by the speed of the lift.
Learn more : brainly.com/question/13218948
The first one should be the answer
Answer:
[ 1 0]
[ 0 1]
Step-by-step explanation:
to obtain a matrix product of B * A we have to multiply the first element of the first row of B by the first element of the first column of A and to this add the second element of the first row of B by the second element of the first row of A, so we will get the first term of the resulting matrix
For each term of the resulting matrix, follow this form
[(B11*A11)+(B12*A21) (B11*A12)+(B12*A22)]
[(B21*A11)+(B22*A21) (B21*A12)+(B22*A22)]
[1/4 1/2] * [2 2]
[1/4 -1/2] [1 -1]
[ (1/4)(2)+(1/2)(1) (1/4)(2)+(1/2)(-1) ]
[ (1/4)(2)+(-1/2)(1) (1/4)(2)+(-1/2)(-1) ]
[ 1/2+1/2 1/2-1/2]
[ 1/2-1/2 1/2+1/2]
[ 1 0]
[ 0 1]