Hello all, Im posting here for the first time and need a little help with some work.
Im trying to work on this problem
$\displaystyle
5\sqrt{72} - \sqrt{32} + 6\sqrt{98}
$
but im absolutely lost....
Thanks for the help in advance,
Aaron
Hello all, Im posting here for the first time and need a little help with some work.
Im trying to work on this problem
$\displaystyle
5\sqrt{72} - \sqrt{32} + 6\sqrt{98}
$
but im absolutely lost....
Thanks for the help in advance,
Aaron
try putting the forward slash in the bottom bracket to make it look like [/tex]
$\displaystyle
\sqrt{25*72} - \sqrt{32} + \sqrt{36*98}
$
Im not sure if the equation above is correct, because according ot my math book it says "These radicals cannot be be subtracted in their present form because they contain different radicands. When that occurs, determine whether one or more of the radicals can be simplified so that they have the same radicands. then it gives an example of
$\displaystyle
5\sqrt{3} - \sqrt{12} = 5\sqrt{3} - \sqrt{4*3}$
$\displaystyle = 5\sqrt{3} - \sqrt{4} * \sqrt{3}$
$\displaystyle = 5\sqrt{3} - 2\sqrt{3} $
$\displaystyle = (5 - 2)\sqrt{3} = 3\sqrt{3}$
But the book doesnt give an example of how to do both adding and subtracting radicals with different radicands
Ill explain in words the best I can.
EX) 5*sqrt2 is the same thing at sqrt(2*25)
This is done by squaring the number that the square root is being multiplied by in this case the 5.
So sqrt of (2*25) or 50 is 5*sqrt2.
__________________________________________
What I did to solve your problem was make all the parts of the problem to be multiplied by the same square root (sqrt2)
Need further explaining?