bonjour
F = 8 + 2x - 2x(3x - 4) + 5x(3 - x)
= 8 + 2 x - 6 x² + 8 x + 15 x- 15 x²
= - 21 x² + 25 x + 8
O = (4z + 3)²
= 16 z² + 24 z + 9
P = 6 + (5y - 2)(3 - 4y)
= 6 + 15 y - 20 y² - 6 + 8 y
= - 20 y² + 23 y
Q = 5z - (4z + 3)(-2=- 5)
= 5 z - ( - 8 z - 20 z - 6 - 15 )
= 5 z + 28 z + 21
R = 6(2x - 1)(3 - x)
= 6 ( 6 x - 2 x² - 3 + x )
= 36 x - 12 x² - 18 + 6 x
= - 12 x² + 42 x - 18
