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Equations, SM-Bank 062

Solve, giving all solutions correct to 1 decimal place.

  1. \(x^2=8\)  (2 marks)

    --- 3 WORK AREA LINES (style=lined) ---

  2. \(x^2=323\)  (2 marks)

    --- 3 WORK AREA LINES (style=lined) ---

Show Answers Only

a.    \(x=\pm 2.8\)

b.    \(x=\pm 18.0\)

Show Worked Solution
a.    \(x^2\) \(=8\)
  \(\sqrt{x^2}\) \(=\pm\sqrt{8}\)
  \(x\) \(=\pm 2.828…\ =\pm 2.8\)

 

b.    \(x^2\) \(=323\)
  \(\sqrt{x^2}\) \(=\pm\sqrt{323}\)
  \(x\) \(=\pm 17.972…\ =\pm 18.0\)

Filed Under: Equations Tagged With: num-title-ct-core, smc-4215-35-Quadratics

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