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What are the solutions to the equation x2 + 6 = 87? A. –10 and 10 B. The equation has no solutions. C. –6 and 6 D. –9 and 9

Sagot :

Panoyinidn
x² + 6 = 87
     - 6   - 6
       x² = 81
       x = +9
x = 9    U    x = -9
The solution set is equal to D. {+9}.
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