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You can either use logarithmic tables, or trial and error.

With trial and error, you make a guess at what the square root might be, and then see how close you are to the number when you multiply the guess by itself.... say I'm looking for the square root of 12,345. I know that it must be more than 100 - because 100 x 100 = 10,000 so I can guess at 120 and see what 120 x 120 makes.

That turns out to be 14,400 - which is a bit high, so I can try halfway - 110 x 110 = 12,100.... so now I'm getting closer.

I can try like this to refine the number closer and closer to the desired number. 111 x 111 = 12,321... so I need to go to decimal places....

111.5 x 111.5 = 12432.25... still a but high, so I'll drop down to

111.2 x 111.2 That gives me 12365.44... so I need to go down more

111.1 x 111.1 = 12343.21 - now I'm getting really close.

Let's try 111.13 x 111.13... and so on, getting closer and closer all the time.

Q: How do you Plus square roots?

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The square root of 25 plus the square root of 36 = 11

square root of 4x is 2 times square root of x, so answer is square root of x times 3 since it is 2 square roots of x plus one of them

Any positive number has two square roots, one positive and one corresponding negative. In this instance, sqrt(4356) = Â±66 (that is, plus or minus 66).

Concrete.

The two square roots are +70 and -70 .

Related questions

It is: 0

x=16

Like every other number 1600 has only two square roots, plus and minus 40.

plus or minus. You see it often with square roots. The square root of 9 is plus or minus 3.

The square roots of 19 are plus and minus 4.3589 (rounded)

None, it involves the square root of a negative number so the roots are imaginary.

Â±9 (plus or minus 9).

Assuming the roots are positive, then ~ 15.59.

The square root of 25 plus the square root of 36 = 11

square root of 4x is 2 times square root of x, so answer is square root of x times 3 since it is 2 square roots of x plus one of them

Any positive number has two square roots, one positive and one corresponding negative. In this instance, sqrt(4356) = Â±66 (that is, plus or minus 66).

The square roots are -1.07 and +1.07The square roots are -1.07 and +1.07The square roots are -1.07 and +1.07The square roots are -1.07 and +1.07