The exponent of each term in the equation is
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The graphical way is probably the simplest. Draw a graph of the equation. Hold a ruler parallel to the y axis and slide it from left to right. If, at any point, the ruler touches
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If you graph these, you can use the vertical line test to determine a function that assigns one and only one y value in the range. to every x value in the domain.
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To solve this equation for y I would suggest that you add1 to both sides and then factorise the resulting quadratic in y. You will get If you now square root both sides you get so
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