What is the value of z so that –3 and 3 are both solutions of x² + z = 25? 22 16 41 9

Alain Boudard asked Nov 28, 2023

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Alain Boudard asked Nov 28, 2023

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9 votes

Notice that:

Substituting x²=9, we get the following equation:

Solving for z, we get:

$\begin{gathered} z=25-9, \\ z=16. \end{gathered}$

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