a math question
By redhotpogo
@redhotpogo (4401)
United States
March 11, 2010 1:33am CST
This may seem a bit silly to you guys, but its been years since I was in school, and well in the real world you just don't use much of what you learned, so its easily forgotten. I'm wondering can anyone tell me how I find the square root of a number. Please explain it step by step.
1 person likes this
2 responses
@Greentearoxxd (51)
• Malaysia
11 Mar 10
Its easy, let the number u want to find its square root be x, and the x square root is y square, example, the square root of 4 is 2 because 2x2=4, the square root of 9 is 3 because 3x3=9 and so on. The square roots must be identical. Another example is the square root of 16 is 4 because 4x4=16, hope you get it ^^
@redhotpogo (4401)
• United States
11 Mar 10
so its the highest number that can be multiplied by itself to reach that number?
ex: 25 = 5 (5x5=25) hmmm what about 21? (10.5?)
@Greentearoxxd (51)
• Malaysia
12 Mar 10
No, try to times 10.5 by 10.5, it will equal to 100.25 instead of 21. 21 is a little bit difficult and we need a calculator to do it, and the answer should be 4.58 (correct to 2 decimal places). And also, every positive number have only 2 types of square root. For example, the number 100 can be expressed as 10X10 OR -10X-10 (The negatives cancel out each other), and yes as you can see, the figures remain intact, except for the negative sign and the positive sign. Try this one, the square of 81 is?
