i need serious help!!!
what is the square root of 20??? and how do u do it???
2006-09-24 10:58:16 · 7 answers · asked by star_1987_13 1 in Science & Mathematics ➔ Mathematics
what is trial and error ? how do u do it??
2006-09-24 11:09:06 · update #1
trial and error is when you try your best estimate'''
you know √of 16 =4,
and √25=5,
so it must be in between,
try 4.3... it's too low...
try 4.4...it's too low
try 4.5...it's too high
so now you know it's between 4.4 and 4.5,
try 4.45... it's too low
try.... etc
until you have it accurate enough to your satisfaction
also it goes on to infinity,
it's an irrational number like π (pi)
2006-09-24 11:46:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The square root 20 is the same as the square root 4 times the square root 5.
The square root 4 = 2, so square root 20 = 2 square root 5.
Hope this helps. Good luck.
2006-09-24 18:18:48 · answer #2 · answered by SmileyGirl 4 · 0⤊ 0⤋
a square root means that you want to know what two identical numbers multiplied together equal that number. 20 doesn't have a perfect square root....25 does, that would be 5 because 5 times 5 is 25. when you don't have a perfect square root you find the two numbers that multiplied together give you 20, in this case that is 4 times 5. We know that 2 times 2 is 4 so 2sqrt of 5 is the answer. or you can plug it in the calculator and get a decimal number.
2006-09-24 19:10:17 · answer #3 · answered by angeliquedesjardins 3 · 0⤊ 0⤋
20 = 4 times 5
The square root of 4 is 2, so the square root of 20 is
sqrt(20) = 2 sqrt(5)
2006-09-24 18:02:11 · answer #4 · answered by MsMath 7 · 1⤊ 0⤋
the square root of 20 is approximately 4.47 Use a calculator or try trial and error
2006-09-24 18:02:46 · answer #5 · answered by wild_turkey_willie 5 · 0⤊ 0⤋
Mathgirl8 is absolutely correct.
2006-09-24 18:10:26 · answer #6 · answered by Lonnie P 7 · 0⤊ 0⤋
4.47
punch it into your calculator
2006-09-24 18:00:21 · answer #7 · answered by The Terminator 2 · 0⤊ 1⤋