Transcript File

Do Now

Describe in words the
steps to solving this
particular equation.
2 x  11  19
Focus Question: How can we
solve equations with radicals?
October 15, 2013
Radicals

Radicals are the
inverses of powers.
121  11
2
11  121
Solving is an act of separating and
undoing.

We have tools for stripping complexity out of
equations.



Addition and subtraction get rid of each other.
Division and multiplication are inverses.
And powers and radicals can wipe one
another out.
Solving with Radicals.

Never try to just move
stuff under a radical.
This is illegal.
1.
Isolate the radical.
Square on both sides.
Solve.
Check!
2.
3.
4.
x 1  2  x  3
For Example
n2 3
9 x  20  x
Finally…
x 1  2  x  3
Practice
1) 3x  6  6
3) 2 x  5  x
2) 2 x  4  10
4) x  5 x  6
Solving with Radicals.

Never try to just move
stuff under a radical.
This is illegal.
1.
Isolate the radical.
Square on both sides.
Solve.
Check.
2.
3.
4.
x 1  2  x  3
EXIT TICKET
5  x  x 1