Q: What is 2 square root of 20 - square root of 20 plus 3 square root of 20 - 2 square root 45?

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You can always add radicals, but you can't simplify unless the radicands have a common factor. For example, the square root of 20 plus the square root of 45 equals 2 times the square root of 5 plus 3 times the square root of 5, which is 5 times the square root of 5.

No, nor is it a real number. The square root of minus 54 is equal to the square root of plus 45, times i.

3 times the square root of 5

sqrt(5) + sqrt(45) = sqrt(5) + sqrt(9*5) = sqrt(5) + sqrt(9)*sqrt(5) = sqrt(5) + 3*sqrt(5) = 4*sqrt(5)

About 6.71 meters.

Related questions

45+45+90

You can always add radicals, but you can't simplify unless the radicands have a common factor. For example, the square root of 20 plus the square root of 45 equals 2 times the square root of 5 plus 3 times the square root of 5, which is 5 times the square root of 5.

No, nor is it a real number. The square root of minus 54 is equal to the square root of plus 45, times i.

Square root of 45 times square root of 45 = 45

45 is the square root of 2,025 (45 x 45 = 2025).

√45 = 6.708203932499369

The square root of 45 in simplest form is 3sqrt(5). You take the 2 roots from 45 (5 and 9) and find out the square root of 9 is 3, while the square root of 5 is still just square root 5.

3 times the square root of 5

45

sqrt(5) + sqrt(45) = sqrt(5) + sqrt(9*5) = sqrt(5) + sqrt(9)*sqrt(5) = sqrt(5) + 3*sqrt(5) = 4*sqrt(5)

45 + 20 = 65

one over the square root of 2 or 0.850903525