Answer
a) = 3x - 1
b) $= 40{x^2} - 31x + 6$
Work Step by Step
a) (8x - 3) - (5x - 2)
= 8x - 3 -5x + 2
= 3x - 1
b) (8x - 3) (5x - 2)
= 8x(5x) + 8x(-2) - 3(5x) - 3(-2)
$= 40{x^2} - 16x -15x + 6$
$= 40{x^2} - 31x + 6$
Difference between (a) and (b):
a) is subtraction. Numerical coefficents of like/similar terms are being subtracted.
b) is multiplication. All terms, similar or not, are multiplied.