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2010-03-20T13:30:09+01:00
A) x√9 -2²=x √25+ ³√8
3x-4=5x+2
3x-5x=2+4
-2x=6/ :(-2)
x=-3

b) √4 (x+4°)= -³√64-x
2(x+1) = 4-x
2x+2=4-x
x=4-2
x+2

d) x+6°/ 3 - 2(-9°+x)/ √81= 3°/√9 - x/3³
x+1/3 - 2(-1+x)/9= 1/3 - x/9
x+1/3- -2+2x/9= 1/3- x/9 /*9
3(x+1) - (-2+2x)= 9*1/3 - 9*x/9
3x+3- (-2+2x)= 3-x
3x +3+2-2x=3-x
x+5= 3-x
2x= 3-5
2x= -2/:2
x= -1

c) x/√36 +( √2)²= x+3°/√9 - x
x/6 +2 = x+1/3-x/*6
x+12= 2(x+1)
x+12= 2x+2
x=2-12
x=-10