Solve by taking square roots
X^2 +25 = 0

x = ± 5i

Step-by-step explanation:

x² + 25 = 0 ( subtract 25 from both sides )

x² = - 25 ( since negative the roots are not real )

Take square root of both sides

x = ± = ± = ± 5i

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3