Problem

x2−16=0

Answer

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Answer

x=4,−4

Steps

Step 1 ：Solve the quadratic equation x2−16=0 by factoring.

Step 2 ：x2−16=(x−4)(x+4)

Step 3 ：Set each factor equal to zero: (x−4)=0 and (x+4)=0

Step 4 ：Solve for x: x=4 and x=−4

Step 5 ：x=4,−4

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