Vector operation 7 (a + b) - 8 (a-b) Where a and B are vectors, and the simplified formula
It's the same as the ordinary formula
-a+15b
How to square the sum of vector a and B
a=(m,n)
b=(x,y)
a+b=(m+x,n+y)
(a+b)^2=(a+b)(a+b)=(m+x,n+y)(m+x,n+y)=(m+x)^2+(n+y)^2
=m^2+x^2+n^2+y^2+2mx+2ny
How to square the vector a
Is equal to the square of the vector a module
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