(7v5+11) (2v5-6)

Question

multiplication of binomials containing radicals.

Answer 1

Good evening Mike,

Let us assume that v5 is used to mean square root of 5.

if you remember FOIL from algebra 1, you will remember to multiply First, Outer, Inner and Last pairs of values.

therefore,

(7v5*2v5) + (7v5*(-6)) + (11*2v5) + (11* (-6)) =

14*5         + (-42v5)      + 22v5       + (-66)    =  (combine like terms)

 70 - 66 - 20v5  =

4 - 20v5