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An angle between 90 degrees and 180 degrees. NB- a reflex angle is an angle between 180 degrees and 360 degrees.

Solving simultaneous allows us to determine the value of two variables from two equations. 2x+y = 133x+2y = 21
To find the value of the variables, our first step is to choose a variable and have equa...

16^1/5 x 2^x =8^2/3 work out x

First concentrate on expanding the squared term, don't try and do it all in your head, the 2x+3y term should expand to give 4 separate terms. Then combine any terms with the same configuration of x and y,...

Since there are two terms multiplying together, when either of them are equal to zero, the total multiplication will also be zero. Ie, 10 x 0 = 0. This means that to find the two roots, we can simply equa...