Jawabanmu

2014-08-31T19:48:08+07:00
Lw sepngethuan sya.

7(akr3)x-3x=18 (d kuadrt kn)
147x^2 - 42 akar3 xkuadrt+9x kuadrt =324
156 x kuadrt - 72,75x kuadrt=324
83,25x kuadrt=324
x^2= 3,89 (d bult kn)
x^2=4
x=2.

lw gk slh sich.
2014-08-31T19:49:37+07:00
Kalo gak salah hitung jwbnyya x = 1,53
crny:
[ 7 (akar 3) x -3x ] pngkt 2 = [ 18 ] pngkt 2              .................. (ke2 ruas dikuadratkn
49.3.x^2 - 9x^2 = 324
147x^2 - 9 x^2 =324
138x^2  = 324
x^2  = 2,35
x = 1,53