# Answer on Geometry Question for Ladajah Arnold

Question #9687

if ab=2 and a'b'=3 then the scale factor is ...?

Expert's answer

we have two vectors x=(x1,x2) and y=(y1,y2) then scale product

(x,y)=x1*y1+x2*y2

in our case first vector (a,a') second (b,b') then scale

product will be a * b+a' * b'=2+3=5

so scale product is equal to f5

(x,y)=x1*y1+x2*y2

in our case first vector (a,a') second (b,b') then scale

product will be a * b+a' * b'=2+3=5

so scale product is equal to f5

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