## anonymous 4 years ago please REALLY help question is on attachment!!!!

1. anonymous

RATINONLIZE THE DENOMINTOR

2. anonymous

if we simplify the bottom we get $\sqrt{7}-2$

3. anonymous

did you already combine like terms in the denominator?

4. anonymous

we have to multiply by its conjugate $\sqrt{7}+2$ to get rid of the radical on the bottom, to make the equation stay equal we multiply by the conjugate/conjugate which equals 1, anything times 1 is itsself so it doesnt change the equation

5. anonymous

the top (5) times the conjugate is $5\sqrt{7} + 10$

6. anonymous

on the bottom it is $3$

7. anonymous

so we have |dw:1327711885632:dw|