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Pythagoras theorem is: A^2 + B^2 = C^2. This might look confusing but it is actually quite simple. Pythagoras can only be used on a RIGHT ANGLED TRIANGLE! Then what you do is that the side of the triangle...

To start with trying simplify any equation, you need to first see if the top part of the equation and the bottom part can be factorized. Fortunately the top part and bottom part of the equation are both q...

Both verbs mean "to be" but the key difference is in the permanence of what they are describing. "Ser" is used when you're describing an essential characteristic of the person or thing...

As an English speaker, a language that no longer uses cases, it can be really tricky to get to grips with the German case system. But once you start practising, you'll find it's not as horrible as you thi...

A vaccine contains a dead or inactive (an therefore harmless) form of a pathogen. By injecting this into the body, an immune response is triggered and white blood cells produce antibodies specific to the ...