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

7 answers

I 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

An expression is show: √65x; for which value of x should the expression be further simplified?

Absolutamente nada

For which value of x must the expression
77x
be further simplified?
A) 13
B) 23
C) 29
D) 33

This did not help at all

I know right TUT