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Substitute x in terms of y into the first equation:

(2y+6)²+y²=36

Use FOIL to expand the brackets

4y²+24y+36+y²=36 ...

When a question asks you to make something the subject of an equation, it is asking you to rearrange it to get it in the form of, for example when 'p' is the subject, 'p = ....'

First we ...

the aim of finsing the inverse is making x the subject. To start we need to multiply both sides by: (x-1), giving us:y(x-1) = 2x+1now we need to expand the brackets:yx - y = 2x+1now gather all the x compo...

To find the inverse we're wanting to make x the subject. First start by multiplying both sides by (x-1), this gives us y(x-1) = 2x+1. Expand the brackets giving yx - y = 2x+1. Gather all the x components ...

Expand: x² + 2x + 3x +6 = 2x+4
Take (2x+4) from both sides: x²+3x+2 = 0
Facorise: (x+2)(x+1) = 0
So solutions are x=-2 and x=-1