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

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

so
that gives
so (x-3)(x+3)=0
so the real roots are 3 and -3
RELATED QUESTIONS
I need to find all the real roots of this equation x^3+3x^2-9x-27=0 by using the rational (answered by richwmiller)
find the rational roots of the equation... (answered by richwmiller)
Find the roots of the polynomial equation: x^3 � 3x^2 + 9x � 7 = 0 (answered by tommyt3rd)
X^4+3X^3+9X^2+6X-12=0 find the roots of this... (answered by Edwin McCravy)
Find all the real roots of equation x^4 + 2x^2 − 24 = 0. (answered by ewatrrr)
Use the Rational Root Theorem to find all the roots of each equation. 4. x'3 +... (answered by stanbon)
how do you find the number of complex roots in a equation such as {{{ a^2-81=0... (answered by richard1234)
Find the real or imaginary numbers of the equation: x^-2 - 9x^-1 +... (answered by jim_thompson5910,stanbon)
Find the real solutions of the equation by factoring:... (answered by nerdybill)