Jawabanmu

2014-05-09T21:20:19+07:00
X2+2x-8=0
(x+4)(x-2)=0
x1= -4 x2=2

a) x1+x2= -4+2=-2
b) x1.x2= -4.2= -8
c) [-4] x^{2} . [2] x^{2}= -8
d) [-4] x^{2} + [2] x^{2}= 32