SOLUTION: simplify radical 18 - radical 50 12 radical x + 2 radical x i solved them for the first one i got -30 and the second one i got 24x but i dont know if i am doing them corr

Algebra ->  Radicals -> SOLUTION: simplify radical 18 - radical 50 12 radical x + 2 radical x i solved them for the first one i got -30 and the second one i got 24x but i dont know if i am doing them corr      Log On


   

Question 152787: simplify
radical 18 - radical 50
12 radical x + 2 radical x
i solved them for the first one i got -30 and the second one i got 24x but i dont know if i am doing them correct i need to see the steps
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
simplify
radical 18 - radical 50
12 radical x + 2 radical x
:
I have no idea how you got those answers but here's what I think
:
sqrt%2818%29+-+sqrt%2850%29
:
Factor inside the radicals to reveal the perfect squares
sqrt%289%2A2%29+-+sqrt%2825%2A2%29
;
Extract those squares:
3%2Asqrt%282%29+-+5%2Asqrt%282%29
:
Now we have like terms (sqrt%282%29) so just do the math:
-2sqrt%282%29
;
:
12%2Asqrt%28x%29+%2B+2%2Asqrt%28x%29
:
These are like terms (sqrt%28x%29), just do the math
14%2Asqrt%28x%29