Sagot :
Bonsoir
E = ( x - 10 ) ( x + 10 )
F = ( 5 x + 1 ) ²
G = ( 7 x - 4 )²
H = ( 4 x - 3 ) ( 4 x - 3 + 2 x + 7 )
= ( 4 x - 3 ) ( 6 x + 4 )
= 2 ( 4 x - 3 ) ( 3 x + 2 )
E - F - G sont des applications des identités remarquables:
E = (x+10)(x-10) => a²-b² = (a+b)(a-b)
F = (5x+1)² => (a+b)² = a²+2ab+b²
G = (7x-4)² => (a-b)² = a²-2ab+b²
H = (4x-3)(4x-3+2x+7) = (4x-3)(6x+4)