Question

find the square root of 784​

Answer 1

The square root of 784=28

It is beneficial to be able to estimate, or calculate exactly the square root of any number when a calculator is not present.

For this example, we can start an estimation limit high and low as follows:

20×20=400 is too low

30×30=900 is too high, but closer to 784

If we raise the lower limit to 25:

25×25=625 is still too low, but closer.

Now our range is 26→29.

But the squared number ends in 4, and the only number in our range multiplied by itself to result in a 4 would be 8×8.

So the Square root of 784=28

Answer 2

Answer:

28

Step-by-step explanation:

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