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The Soviet Army was considerably weaker and underprepared for war, especially compared to that of Germany, as a result of Stalin's purges of the military. Stalin needed to form a mutual defence pact with ...

Liberals are committed to constitutionalism due to their belief that in order to prevent a government from becoming overly powerful, there needs to be some kind of check to that power. Constitutions provi...

x^2 + y^2 = 29y - x = 3Rearrange the second equation such that one variable, either x or y, is the subject. I will rearrange to make x the subject. x = y - 3. Substitute the new equation into equation 1 i...

1. Square the brackets (3n+1)²= (3n+1)(3n+1) = 9n²+3n+3n+1 = 9n²+6n+1 (3n-1)²= (3n-1)(3n-1) = 9n²-3n-3n+1 = 9n²-6n+12. Write out the full equation (9n²+6n+1) - (9n²-6n+1) = 9n²+6n+1-9n²+6n-1 = 12n3. Ex...

There are two ways of solving the simultaneous equations. The easiest one is to write two equations beneath each other and then try to get either x or y values the same on both of them by multiplying the ...