bonjour
A
x
x + 5
( x + 5 ) ( x + 2 )
= x² + 2 x + 5 x + 10
= x² + 7 x + 10
B
x
x + 7
x ( x + 7 )
x ( x + 7 ) + 10
= x² + 7 x + 10
Je choisi x comme chiffre de départ.
Programme A :
(x + 5) × (x + 2) =
= x × x + x × 2 + 5 × x + 5 × 2
= x² + 2x + 5x + 10
= x² + 7x + 10
Programme B :
(x + 7) x + 10 =
= x × x + 7 × x + 10
= x² + 7x + 10
