# Introduced 81104

The * (asterisk) operation assigning one number to two pairs of numbers is introduced as follows:

(a, b)*(c, d) = ac+bd

We know that:

(x,2)*(-1, v) = -1 and (2,-1)*(u, v)=5 and (u, v)*(1,1)=-2

What is (1,2)*(x, y) equal to if y=3?

(a, b)*(c, d) = ac+bd

We know that:

(x,2)*(-1, v) = -1 and (2,-1)*(u, v)=5 and (u, v)*(1,1)=-2

What is (1,2)*(x, y) equal to if y=3?

## Correct answer:

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