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2. a+b = -4====> a= -b-4
ab= 4
(-b-4)b=4
-b^2 -4b - 4=0
diperoleh b=-1 atau b=-4
maka a=-4 atau a=-1
3.-(2^(3+4))= - 2^7
4. V24 = V(2^2 * 6) = 2V6
2. -1 & -4
3. -72
4. 2 akar 6