We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
173
4
avatar+269 

Q1)

Q2)

Q3)

Q4)

 Oct 14, 2018
 #1
avatar+99586 
+2

1.  v^2 -8v  - 59  = -2    add 59 to both sides

 

v^2  - 8v     =  57       take 1/2 of 8  = 4...square it  = 16....add to both sides

 

v^2  - 8x + 16  = 57 + 16     factor the left side, simplify the right

 

(v - 4)^2  =  73      take both roots

 

x - 4 =  sqrt73          x  - 4  =  -sqrt73

 

add 4 to both sides

 

x = 4 + sqr73     or      x =  4 - sqrt73

 

 

cool cool cool

 Oct 14, 2018
 #2
avatar+99586 
+2

16x^2  + 9y^2

 

[ 4x  + 3iy ]  [ 4x  - 3iy ]

 

 

cool cool cool

 Oct 14, 2018
 #3
avatar+99586 
+2

x^2  + 4x  + 13    = 0      subtract 13 from both sides

 

x^2  +  4x   =  -13         take 1/2 of 4 = 2...square it =  4  add to both sides

 

x^2  + 4x  +  4 =  -13 + 4        factor the left...simplify the right

 

(x + 2)^2  = -9     take both roots

 

x + 2  = sqrt (-9)      or   x + 2  = -sqrt(-9)

 

x+ 2  = 3i               or     x + 2  = -3i       subtract 2 from both sides

 

x = -2 + 3i   or    x =  -2 - 3i

 

 

 

cool cool cool

 Oct 14, 2018
 #4
avatar+99586 
+2

x^2 + 27  = 0

 

x^2  = -27       take both roots

 

x =  sqrt (-27)    or  x   =  -sqrt (-27)

 

x =   i *sqrt (27)     or    x  =  -i * sqrt (27)

 

x =  i * sqrt  ( 9 * 3)   or  x   = -i * sqrt (9 * 3)

 

x = 3isqrt(3)   or x = -3isqrt(3)

 

 

cool cool cool

 Oct 14, 2018

29 Online Users

avatar
avatar