Question

Solve the equation (x^2 - 4 = 77).

a) (x = √73)
b) (x = -√73)
c) (x = 9)
d) (x = -9)

Answer 1

The solutions to the equation x^2 - 4 = 77 are x = 9 and x = -9.

Step-by-step explanation:

The given equation is x^2 - 4 = 77. To solve this equation, we can start by adding 4 to both sides to isolate the variable on one side:

x^2 = 81

Next, we can take the square root of both sides:

x = ±√81

Simplifying further:

x = ±9

Therefore, the solutions to the equation are x = 9 and x = -9.