Question 312592
{{{7sqrt(45)- 2sqrt(5)=7sqrt(9*5)-2sqrt(5)}}}
 {{{7sqrt(45)- 2sqrt(5)=7*3sqrt(5)-2sqrt(5)}}}
 {{{7sqrt(45)- 2sqrt(5)=21sqrt(5)-2sqrt(5)}}}
 {{{7sqrt(45)- 2sqrt(5)=19sqrt(5)}}}