Question

if a= 2 b=-1 c=4 then find the value of the algebraic expression a²+b²+c²-bc-ca-ab​

Answer 1

Answer:

19

Step-by-step explanation:

2^2 + (-1)^2 + 4^2 - (-1) x 4 - 4 x 2 - 2 x (-1)

4 + 1 + 16 - (-4) - 8 + 2

21 + 4 - 8 + 2

25 + 2 - 8

27 - 8

19

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