# Question #423d5

##### 1 Answer

Nov 28, 2017

#### Explanation:

#20 1/4=81/4#

#rArrsqrt(20 1/4)=sqrt(81/4)#

#rArrsqrt(81/4)=+-9/2larrcolor(blue)"note plus or minus"#

#[9/2xx9/2=81/4" and "-9/2xx-9/2=81/4]#