How do you multiply 3\sqrt { 5} \cdot 3\sqrt { 5}3√5⋅3√5?
1 Answer
Feb 23, 2017
Explanation:
separate the integers from the radicals.
rArrcolor(red)(3)xxcolor(blue)(sqrt5)xxcolor(red)(3)xxcolor(blue)(sqrt5)⇒3×√5×3×√5
=(color(red)(3)xxcolor(red)(3))xx(color(blue)(sqrt5)xxcolor(blue)(sqrt5))=(3×3)×(√5×√5)
=9xx5=9×5
=45=45
