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Question

Solve the equations :
ax+by+cz=a2x+b2y+cz=0,x+y+z+(bc)(ca)(ab)=0.

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Solution

ax+by+cz=0a2x+b2y+c2z=0xbc2b2c=yac2a2c=zab2a2bxbc(bc)=yac(ca)=zab(ab)=kx=kbc(bc),y=kac(ca),z=kab(ab)x+y+z+(bc)(ca)(ab)=0

Substituting x,y and z

kbc(bc)+kac(ca)+kab(ab)+(bc)(ca)(ab)=0k{bc2b2cac2+a2c+ab2a2b}+{(bcabc2+ac)(ab)}=0k{bc2b2cac2+a2c+ab2a2b}+{abca2bac2+a2cb2c+ab2bc2abc}=0k{bc2b2cac2+a2c+ab2a2b}{bc2b2cac2+a2c+ab2a2b}=0k1=0k=1x=bc(bc),y=ac(ca),z=ab(ab)


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