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(x-5)(2x-3)= 2x² -3x-10x+15

= 2x² -13x + 15

If we know that y is proportional to x² then we using the given values we can write 75= 5² --> 75=25, however this is obviously not true but all that remains is to multiply the 5<...

The objective of the question is to find an answer to x = ?, where ? is a number.

Start by 'moving' all the x's to one side of the equals sign and all the numbers to the other. This can be done by ...

Firstly, expand out the first bracket -    4x - 8 - 2(3 - 5x)    
Then the second bracket (remember a minus x a minus = a positive) -     4x - 8 - 6 + 10x

Then finally group the like terms to...

This question is asking us to make x the subject, so we’re aiming to end up with just x on its own on one side of the equation. Firstly, we need to get rid of the x on the bottom of the right-hand side, s...