Question

Which are the roots of the quadratic function f(q) = q2 – 125? Select two options.

q = 55 StartRoot 5 EndRoot
q = -5Negative 5 StartRoot 5 Endroot
q = 33 StartRoot 5 Endroot
q = -3Negative 3 StartRoot 5 EndRoot
q = 2525 StartRoot 5 EndRoot

Answer 1

Solve q^2 − 125 = 0 → q^2 = 125 → q = ±√125 = ±5√5.

So the two correct choices are q = 5√5 and q = −5√5 (the options giving +5√5 and −5√5).