SOLUTION: find the real roots of the equation: {{81-9x^2=0}}

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Question 251237: find the real roots of the equation: {{81-9x^2=0}}
Found 2 solutions by edjones, vksarvepalli:
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
81-9x^2=0
9(9-x^2)=0
(3+x)(3-x)=0
x=3, x=-3
.
Ed

Answer by vksarvepalli(154) About Me  (Show Source):
You can put this solution on YOUR website!
81-9x%5E2=0
so 81=9x%5E2
that gives x%5E2=9
so (x-3)(x+3)=0
so the real roots are 3 and -3