Question 49906
a. 4√72 - 2√48
  {{{4* sqrt(36)*sqrt(2) - 2 *sqrt(16)*sqrt(3)}}}
 {{{4 *6*sqrt(2) - 2 *4*sqrt(3)}}}
 {{{24*sqrt(2) - 8*sqrt(3)}}}



b. √75 - √48
 {{{sqrt(25)*sqrt(3) -  sqrt(16)*sqrt(3)}}}
 {{{5*sqrt(3) -4*sqrt(3)}}}
 {{{sqrt(3)}}}


For more detailed explanations see my Lesson Plan "Adding and Subtracting Square Roots" in Square-cubic-other-roots in Algebra.com.  Also, please see my website by clicking on my tutor name.


R^2 at SCC