What is the principal square root of -4

The principal square root of -4 is 2i.

Step-by-step explanation:

= 2i

We have the following steps to get the

Applying radical rule

We get

As per imaginary rule we know that

=

Now

Hence, the answer is 2i.

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

answer4 to the second power is 16

and 4 to the third power is 64,