math,algebra,help
posted by Jasmine20
Directions are simplify by combining like terms.
x radiacal 18 3 radical 8x^2
can someone show me how to do these types of problems. thanks
I cant determine the second term. For the first, I think you meant
x sqrt(18) which reduces to
x sqrt (9*3) or
3x sqrt 3
First remove squares from under the radical sign
x sqrt(18) = x sqrt (9*2) = 3x sqrt 2
and
3 sqrt(8x^2) = 3 sqrt (4*2*x^2)
= 6x sqrt 2
Now combine terms.
x sqrt(18)  3 sqrt(8x^2)
= sqrt 2*(3x  6x) = 3x sqrt 2
You can get other possible answers by using the negative square roots. For example
x sqrt(18) = x sqrt (9*2)
= (+ or ) 3x sqrt 2
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