Equation

Eequation f(x) = 0 has roots x₁ = 64, x₂ = 100, x₃ = 25, x₄ = 49. How many roots have equation f(x²) = 0 ?

Correct answer:

n =  8

Step-by-step explanation:

$$\begin{gathered} y_1=8;y_2=-8 \\ {y}_3=10;y_4=-10 \\ {y}_5=5;y_6=-5 \\ {y}_7=7;y_8=-7 \end{gathered}$$

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