Problem

c) $9 x^{2}-40=24$

Answer

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Answer

\(\boxed{x \approx 2.67, x \approx -2.67}\)

Steps

Step 1 ：Move all terms to one side of the equation: \(9x^2 - 64 = 0\)

Step 2 ：Use the quadratic formula to find the solutions for x:

Step 3 ：\(a = 9, b = 0, c = -64\)

Step 4 ：\(discriminant = 2304\)

Step 5 ：\(solutions = (2.67, -2.67)\)

Step 6 ：\(\boxed{x \approx 2.67, x \approx -2.67}\)

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