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Why do square roots have more than 1 solution?

As 3 2 is equivalent to (-3) 2 it follows that the square root of 9 must be + or -3.
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Answered by Masudul H. • Maths tutor
3558 Views

An electron and a proton are in any electric field E=5x10^2 V/m. What is their speed 1.0 cm after being released?

F=Eq= 5x10^2 x 1.6x10^-19 = 8x10^-17 N Kinetic energy theory: deltaEc= Fxd =1/2mv^2 thus v= squareroot(2xFxd/m) v(proton) = squareroot(2x8x10^-17x1x10^-2/9.1x10^-31)=1.3x 10^6 m/s v(electron) = squareroot(2x...
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Answered by Emma H. • Physics tutor
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How do I form the imperfect tense in french?

Depending on the competence level/ preferred learning method of the child I would teach verbs slightly differently. For example, repetition through games, songs, acrostics, association with pictures etc. How...
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Answered by Eleanor W. • French tutor
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The area of this rectangle is 56 cm2 length = 3k+2 and width = 7 - Find the value of k

The first step in answering any maths question is to identify key words or key information. Key information is area, length and width. We have been told that the total area is 56cm2. We know that area is len...
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Answered by Ayat B. • Maths tutor
3771 Views

How do you simplify the square root of 18 without using a calculator?

Surds can be simplified if the number in the square root has a square number as a factor. It is also worth remembering that SQRT(ab) = SQRT(a) x SQRT(b). So if you combine these two points, lets look at how ...
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Answered by Richard B. • Maths tutor
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