Is there a real number whose square is −1? a. Is there a real number x such that ? b. Does there exist such that x2 = −1?

a.

b.a real number x

Step-by-step explanation:

We are given that  statement.

We have to rewrite the given statement using variable or variables.

Statement:Is there a real number whose square is -1.

a.Let x bet the real number

The square of real number x written as

According to question

Therefore,

Is there a real number x such that

b.Does there exist a real number x such that

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

step-by-step explanation: