mackenzienr
mackenzienr
15-03-2018
Mathematics
contestada
Solve for x. Simplify completely.
x^2-9=55
Respuesta :
1rstar
1rstar
15-03-2018
★ Exponential reduction ★
[tex]x {}^{2} - 9 = 55 \\ x {}^{2} = 55 + 9 = 64 \\ x {}^{2} = 64 = ( + 8) {}^{2} \\ x = + 8 \\ [/tex]
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 :)
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Answer Link
501stDeathtrooper
501stDeathtrooper
26-04-2019
Answer:
x= 8 x= -8
Step-by-step explanation:
took the test
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