Square roots

[Lisa1970]

Can someone tell me how to figure a square root? I need to be able to do this for the nursing entrance test. My math skills are horrible, & I can't use a calculator.

Thanks,

Lisa

[Lisa1970]

Is there anyone who can tell me how to figure this? It is a sample question on my entrance test.... I copied & pasted it so it is written just like on the test.

If x2 - x - 6 = 0 then x is:

a. -2 or 3

b. -1 or 6

c. 1 or -6

d. 2 or -3

[christinemj]

The problem is solved this way....

x2 - x - 6=0

(x-3)(x+2)=0 (distributive property)

x-3=0 --> x-3+3 = 0+3 --> x=3 (add 3 to both sides)

x+2=0 --> x+2-2 = 0-2 --> x=-2 (subtract 2 from both sides)

And you would choose answer choice A

Christine

Is there anyone who can tell me how to figure this? It is a sample question on my entrance test.... I copied & pasted it so it is written just like on the test.

If x2 - x - 6 = 0 then x is:

a. -2 or 3

b. -1 or 6

c. 1 or -6

d. 2 or -3