Solve x^2 - 4 = 77.
x= _/173 or x= - _/73
x = 9 or x = -9
x = 11 or x = -7
x = 9i or x = -9i

X = 9 or x = -9

Step-by-step explanation:

We want to solve the quadratic equation

We shall use the square root method

Let us add 4 to both sides to get:

We take square to get:

The solution is x=9 or -9

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inch

step-by-step explanation:

yard and mile are too big.