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HELP!! How can I Describe and correct the error in solving the equation.

HELP!! How can I Describe and correct the error in solving the equation.-example-1

1 Answer

6 votes

The error happens at step 4

Instead of
x = √(36), it should be
x = \pm√(36) which leads to
x = \pm 6

The two solutions are x = 6 or x = -6.

Notice that x^2 = 6^2 = 36 and x^2 = (-6)^2 = (-6)*(-6) = 36. The two negatives cancel out.

User Trini
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