Question 223728: find the roots of the following problems:
5squareroot of x,-x=6.
and x^2-8=17.
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Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! 5sqrtx,,,,,with -x=6 or x=-6
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5 sqrt (-6)
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5i(sqrt6),,,,,,with i=sqrt(-1)
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or if problem is ,,,,,,5sqrtx -x =6
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5sqrtx =x+6,,,,,,,,square both sides
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25*x =(x+6)^2 = x^2 +12x +36
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0= x^2 -13x +36,,,,,factor
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(x-9)(x-4) =0
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x=9,,,,4
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2nd problem,,,,,x^2 -8 = 17
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x^2 = 9
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x= +/- 3
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