Just a simultaneous equation I've found and need help on. x^2 + y^2 = 5 y = 3x + 1 Thanks in advance.
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Originally Posted by Mukilab Just a simultaneous equation I've found and need help on. x^2 + y^2 = 5 y = 3x + 1 Thanks in advance. substitute for y and solve ... $\displaystyle x^2 + (3x+1)^2 = 5$ you'll get two solutions where the line intersects the circle.
did that and got a 9x^2 before.... Confused how to get the final product. That's kind of what I was asking for?
Originally Posted by Mukilab did that and got a 9x^2 before.... Confused how to get the final product. That's kind of what I was asking for? $\displaystyle x^2 + (3x+1)^2 = 5$ $\displaystyle x^2 + 9x^2 + 6x + 1 = 5$ $\displaystyle 10x^2 + 6x - 4 = 0$ $\displaystyle 5x^2 + 3x - 2 = 0$ factor and solve.
thank you
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