Evaluate each expression for x = 4 and give answers in simplest form. show your work

a)    

b)    

Step-by-step explanation:

The value given for x is 4

1) The given expression is :  

By solving the negative exponent, we get

Here, substitute x =4,

or,  

2) The given expression is :  

By solving the negative exponent, we get

Here, substitute x =4,

or,    

because its not ur topic and its not for is for homework not that.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13