y=2x+3 x²+y²=2 i get x²+(2x+3)=2 then, x²+(2x+3)(2x+3)=2 then, x²+4x²+12x+9=2 Then im stuck i realise it's a quadratic equation (4x²+12x+9) but i don't know where to go from here. Help greatly appreciated x
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Hello, (4x²+12x+9) this is equal to: (2x)²+2*3*2x+3² If a=2x and b=3 You have a²+2ab+b², which is (a+b)²
Move everything to one side: $\displaystyle 5x^{2} + 12x + 7 = 0$ Factor and see what you get
thanks
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