For which value of x must the expression square root of 19x be further simplified?

1.) An expression is show: √21x; for which value of x should the expression be further simplified?

a.) 5

b.) 8

c.) 37

d.) 54

2.) An expression is show: √42x; for which value of x should the expression be further simplified?

a.) 11

b.) 13

c.) 20

d.) 55

Math - Reiny, Saturday, October 4, 2014 at 11:50amI assume you meant

√ (21x), and not the way you typed

since 21 = 3x7, you want either another 3 or 7 in x so that we have at least one perfect square.

none of the first 3 choices contain a 3 or 7, but 54 does

so √ (21x54)

= √3x7x3x9x2)

= √ (81*14)

= 9√14

do the other one the same way Math - Anonymous, Wednesday, March 8, 2017 at 7:37pmAn expression is show: √65x; for which value of x should the expression be further simplified?