Math, asked by bidangshreemashahary, 7 hours ago

a-b+c=7 and a²+b²+c²=19,then what is the value of ca-ab-bc?​

Answers

Answered by shreyaadu14
0

Answer:

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2ab+2bc+2ca

a²+b²+c²= (a+b+c)²-2ab-2bc-2ca

a²+b²+c²= (7)²-2(ab+bc+ca) a²+b²+c².

= (7)²-2(20) a²+b²+c²

= 49-40 a²+b²+c²= 9

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