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1. First you need to learn how to recognise the form:

Difference of two square numbers.  a² - 36

(a² is a square number and 36 is also a ...

Finding Roots of Quadratic EquationsWhat is a root to an equation?A root to an equation is a set of value(s) that satisfy the equation and when shown graphically they are the x values at whi...

The total number of digits to the right of the point are known as 'decimal points' whereas significant figures start from the first non-zero number. Note: As si...

Suppose we have a triangle with 2 sides of length 4 and 5 (in any units), and the angle between those sides is 60 degrees. We want to find the length of the side opposite the 60 degree angle.

To substitute a number into an algebraic expression, all you need to do is re-write the expression in exactly the same way, except replacing the variable (letter) with the number. It always makes it cl...