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Equations, SM-Bank 060

Show that \(x^2=64\) has 2 solutions.  (2 marks)

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\(\text{See worked solutions}\)

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\(8^2=8\times 8=64\ \ \therefore \ x=8\ \text{is a solution.}\)
\((-8)^2=-8\times -8=64\ \ \therefore \ x=-8\ \text{is a solution.}\)

 
\(\therefore x=8\ \text{and }x=-8\ \text{are both solutions of }x^2=64\)

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

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