Question

Given that y = 18 + 3x²
i) express x in terms of y

Answer 1

`\sqrt{-6 + (y)/(3)} = x`

Explanation:

y = 18 + 3x²

- 18 - 18

__________

`(-18 + y)/(3) = (3x^2)/(3) \\ \\ -6 + (y)/(3) = x^2 \\ \\ \sqrt{-6 + (y)/(3)} = x`

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