1) E = (4x+5) (x-2) - x (x+4).
= 4x² - 8x + 5x - 10 - x² - 4x
= 3x² - 7x - 10.
F = (x - 10) (x+1)
= x² + x - 10x - 10
= x² -9x - 10.
2) E(1) = 3x² - 7x - 10
= 3 × 1² - 7 × 1 - 10
= 3 - 7 - 10
= - 14.
F(1) = x² - 9x - 10
= 1² - 9 × 1 - 10
= 1 - 9 - 10
= - 18
E(-2) = 3x² - 7x - 10
= 3 × (-2)² - 7 × -2 - 10
= 3 × 4 + 14 - 10
= 12 + 4
= 16.
F(-2) = x² - 9x - 10
= (-2)² - 9 × - 2 - 10
= 4 + 18 - 10
= 22 - 10
= 12.