Réponse :
bonjour
A(x) = 4(5x + 2) + (9- 4x) (5x + 2)
= ( 5 x + 2 ) ( 4 + 9 - 4 x )
= ( 5 x + 2 ) ( - 4 x + 13 )
2. B(x) =(3a − 5)(7a + 6) – 2a(3a — 5)
= ( 3 a - 5 ) ( 7 a + 6 - 2 a )
= ( 3 a - 5 ) ( 5 a + 6 )
3. C(x) = 5t(2t − 3) + (3 − 7t) (2t − 3)
= ( 2 t - 3 ) ( 5 t + 3 - 7 t )
= ( 2 t - 3 ) ( - 2 t + 3 )
D(x) = (7x + 1) - 3x(7x + 1)
( 7 x + 1 ) ( - 3 x )
E(x) = (2x + 3)(5 – 3x) — 2(5 – 3x)²
= ( 5 - 3 x ) ( 2 x + 3 - 10 + 6 x )
= ( 5 - 3 x ) ( 8 x - 7 )
Explications étape par étape :
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Réponse :
bonjour
A(x) = 4(5x + 2) + (9- 4x) (5x + 2)
= ( 5 x + 2 ) ( 4 + 9 - 4 x )
= ( 5 x + 2 ) ( - 4 x + 13 )
2. B(x) =(3a − 5)(7a + 6) – 2a(3a — 5)
= ( 3 a - 5 ) ( 7 a + 6 - 2 a )
= ( 3 a - 5 ) ( 5 a + 6 )
3. C(x) = 5t(2t − 3) + (3 − 7t) (2t − 3)
= ( 2 t - 3 ) ( 5 t + 3 - 7 t )
= ( 2 t - 3 ) ( - 2 t + 3 )
D(x) = (7x + 1) - 3x(7x + 1)
( 7 x + 1 ) ( - 3 x )
E(x) = (2x + 3)(5 – 3x) — 2(5 – 3x)²
= ( 5 - 3 x ) ( 2 x + 3 - 10 + 6 x )
= ( 5 - 3 x ) ( 8 x - 7 )
Explications étape par étape :