Salut!:)
a) E( - 1 ) = 8 × ( - 1 )³ + 4 × ( - 1 )² = 8 × ( - 1 ) + 4 × 1 = - 8 + 4 = - 4
F( 1/3 ) = 9 × ( 1/3 )² - 12 × 1/3 + 4 = 9 × 1/9 - 4 + 4 = 1
E( - 1 ) - F( 1/3 ) = - 4 - 1 = - 5
b) E(x) = 8x³ + 4x² = 4x²( 2x + 1 )
F(x) = 9x² - 12x + 4 = ( 3x - 2 )²
