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Let a,b anc be real numbers such that a-7b+8c=4 and 8a+4b-c=7 then the value of a^2-b^2+c^2is: |
| Answer» Let a,b anc be real numbers such that a-7b+8c=4 and 8a+4b-c=7 then the value of a^2-b^2+c^2is: | |