Question

find the zeroes of the poly
${x}^{3} - 3 {x}^{2} - 25x + 75$
If the zeroes are equal in magnitude but opposite in sign.​

Answer 1

Find the zeroes of the poly;

x³ - 3x² - 25x + 75

If the zeroes are equal in magnitude but opposite in sign.

x³ - 3x² - 25x + 75

x = ± 4

x = 3