bonjour
f (x) = 64 x² - 144 x + 91 - ( 24 x - 40 x² + 42 - 70 x )
f (x) = 64 x² - 144 x + 91 - 24 x + 40 x² - 42 + 70 x
f (x) = 104 x² - 98 x + 49
A = 81 ⁻⁷ x ( 3 ⁻³)⁻⁴ x ( 27 : 9 ²) ⁶
= ( 3 ⁴) ⁻⁷ x 3 ¹² x ( 3 ³ : 3 ⁴) ⁶
= 3 ⁻²⁸ x 3 ¹² x ( 3 ⁻¹) ⁶
= 3 ⁻¹⁶ x 3 ⁻⁶
= 3 ⁻²²
