Need having trouble with understanding

1.1i is the answer.

Step-by-step explanation:

We know that for any real number a x a = a square

Even if a is negative, the square is positive because of the rule - when multiplied by - becomes +.

Here we have a square root of a negative number.  So this is an imaginary number only since any real number will have only positive square.

Thus √-1.21 is an imaginary number

Let i represent √-1

Then we have √-1.21 = √-1(√1.21)

= 1.1 i

Thus real root is 1.1 multiplied by imaginary number i.

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.

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