Could you please help me with this problem

Question

Solve -6.(x+5)^2 = 120.

Answer 1

- 6.(x + 5)^2 = 120

Divide each side by negative 6.

(x + 5)^2 = - 20

Substitute  the value - 1 = i².

(x + 5)^2 = 20i²

Extract squareroots.

x+ 5 = ± sqrt(20)i

Subtract 5 from each side.

x = - 5 ± sqrt(20)i.

Solution x = - 5 ± sqrt(20)i.

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