Find the dot product a*b.

a= (5,-9), b=(4,-3)

To find the dot product of two vectors, we multiply the corresponding components of the vectors and then sum up the results.

Given:
a = (5, -9)
b = (4, -3)

To find the dot product a*b, follow these steps:
1. Multiply the corresponding components of the vectors:
(5 * 4) + (-9 * -3)
= 20 + 27
= 47

Therefore, the dot product of vectors a and b is 47.