(x − 7)^2 − 4 = (x + 1)^2

FOIL both sides, that in parenthesis and squared.

For instance.

**(X - 7)(X - 7)**

**= X^2 - 14X + 49**

------So....,

X^2 - 14X + 49 - 4 = X^2 + 2X + 1

Gather all to right side.- 16X + 44 = 0

- 16X = - 44

X = 44/16

======Reduced to.

**11/4**

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