1d)+Radical+Simplification,+Including+Conjugates

=  = = = =  = =  = =    = =       = The conjugate of //a// + is //a// −. They are a conjugate pair. The product of a conjugate is always a rational number. Multiply:  (7 − ) by its conjugate   (7− ) (7 + ) (7 − )(7 + ) = 49 + 7 - 7- 2 (FOIL)

=49-2

=**47**

=    = =   =