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hodyreva [135]
3 years ago
5

Solve for x. Simplify completely. x^2-9=55

Mathematics
2 answers:
djverab [1.8K]3 years ago
8 0
★ Exponential reduction ★

x {}^{2}   - 9 = 55 \\ x {}^{2}  = 55 + 9 = 64 \\ x {}^{2}  = 64 = ( + 8) {}^{2}  \\ x =  + 8 \\
we didn't considered -8 because square root of any real number is always positive , or it's yours choice to deal with minus 8 also :)

★✩★✩★✩★✩★✩★✩★✩★✩★✩★✩★
Irina-Kira [14]3 years ago
3 0

Answer:

x= 8 x= -8

Step-by-step explanation:

took the test

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