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12-51.

Add 49 to both sides.

x² − 14x + 49 = −24 + 49

Simplify.( x − 7 )² = 25

Write two equations.

x − 7 = 5 x − 7 = −5

x = 12 or −2

Add 9 to both sides.

Follow the steps in part (a).

Follow the steps in part (b).

x = 97 or 101

Follow the steps in part (a).