If a+b-c = 12 and a^2+b^2+c^2=110, then ...

If a+b-c = 12 and `a^2+b^2+c^2=110`, then which among the following relations is true ?
(p) ab+bc+ca = 3
(q)ab+bc-ca = 17
(r) ab-bc+ca = 17
(s) ab-bc-ca = 17

(q)

(s)

(r)

(p)

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If a+b-c = 12 and `a^2+b^2+c^2=110`, then which among the following relations is true ? (p) ab+bc+ca = 3 (q)ab+bc-ca = 17 (r) ab-bc+ca = 17 (s) ab-bc-ca = 17

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If a+b-c = 12 and `a^2+b^2+c^2=110`, then which among the following relations is true ?
(p) ab+bc+ca = 3
(q)ab+bc-ca = 17
(r) ab-bc+ca = 17
(s) ab-bc-ca = 17