SOLUTION: 7SQrt(18)-2SQrt(72)

Algebra ->  Radicals -> SOLUTION: 7SQrt(18)-2SQrt(72)      Log On


   

Question 1026923: 7SQrt(18)-2SQrt(72)
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
sqrt%2818%29 = sqrt%289%2A2%29 = sqrt%283%5E2%2A2%29 = 3%2Asqrt%282%29.

sqrt%2872%29 = sqrt%288%2A9%29 = sqrt%282%5E3%2A3%5E2%29 = 2%2A3%2Asqrt%282%29 = 6%2Asqrt%282%29.


From this point please complete your assignment yourself.


Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!
7SQrt(18)-2SQrt(72)
7sqrt%2818%29+-+2sqrt%2872%29

7sqrt%289+%2A+2%29+-+2sqrt%2836+%2A+2%29

7+%2A+sqrt%289%29+%2A+sqrt%282%29+-+2sqrt%2836%29+%2A+sqrt%282%29

7+%2A+3+%2A+sqrt%282%29+-+2+%2A+6+%2A+sqrt%282%29 --------> 21sqrt%282%29+-+12sqrt%282%29 ------> highlight_green%289sqrt%282%29%29