Bonsoir,
[tex]A= -(a-b)+(-b+c-a)\\A=-a+b-b+c-a\\A=-2a+c[/tex]
[tex]B= -(b-c)-(a-b-c)\\B=-b+c-a+b+c\\B=2c -a[/tex]
[tex]C= -(a-b+c)-c+(-a-b)\\C= - a + b - c - c - a - b\\C= -2a - 2c[/tex]
[tex]D=2-(-a-b+c)-(b+a)-c\\D=2+a+b-c-b-a-c\\D=-2c+2[/tex]
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Bonsoir,
[tex]A= -(a-b)+(-b+c-a)\\A=-a+b-b+c-a\\A=-2a+c[/tex]
[tex]B= -(b-c)-(a-b-c)\\B=-b+c-a+b+c\\B=2c -a[/tex]
[tex]C= -(a-b+c)-c+(-a-b)\\C= - a + b - c - c - a - b\\C= -2a - 2c[/tex]
[tex]D=2-(-a-b+c)-(b+a)-c\\D=2+a+b-c-b-a-c\\D=-2c+2[/tex]