Answer:
a) (f + g)(x) = x² - 2x + 3x - 4 = x² + x - 4
domain: x E R
b) (f - h)(x) = x² - 2x - ( - 2x + 1) = x² - 1
domain: x E R
c) (f.g)(x) = (x² - 2x)(3x - 4) = 3x³ - 10x² + 8x
domain: x E R
d)
[tex]( \frac{h}{f} )(x) = \frac{ - 2x + 1}{x {}^{2} - 2x} [/tex]
domain: x E R\{0; 2}
