EX 10 : Factorise les expressions suivantes
A = 4 x² + 3 x = x(4 x + 3)
B = 7 x² - x = x(7 x - 1)
C = 2 x - 5 x³ = x(2 - 5 x²)
D = 4 x² + 8 x = 4 x(x + 2)
E = 5 x² - 15 x = 5 x(x - 3)
F = 2 x² + 8 x = 2 x(x + 4)
G = 5 x³ - x² + 2 x = x(5 x² - x + 2)
H = - 4 x³ - 8 x² = - 4 x²(x + 2)
A=4x² + 3x
=x(4x+3)
B = 7x² - x
= x(7x-1)
C=2x - 5x(3)
=x (2 - 5x²)
D= 4x² + 8x
= 4x (x + 2 )
E= 5x² - 15x
= 5x ( x-3)
F=2x² + 8x
= 2x (x+4)
G=5x(3) - x² +2x
= x (5x² - x +2 )
H= -4x(3) - 8x²
= 4x² (-x - 2 )
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EX 10 : Factorise les expressions suivantes
A = 4 x² + 3 x = x(4 x + 3)
B = 7 x² - x = x(7 x - 1)
C = 2 x - 5 x³ = x(2 - 5 x²)
D = 4 x² + 8 x = 4 x(x + 2)
E = 5 x² - 15 x = 5 x(x - 3)
F = 2 x² + 8 x = 2 x(x + 4)
G = 5 x³ - x² + 2 x = x(5 x² - x + 2)
H = - 4 x³ - 8 x² = - 4 x²(x + 2)
A=4x² + 3x
=x(4x+3)
B = 7x² - x
= x(7x-1)
C=2x - 5x(3)
=x (2 - 5x²)
D= 4x² + 8x
= 4x (x + 2 )
E= 5x² - 15x
= 5x ( x-3)
F=2x² + 8x
= 2x (x+4)
G=5x(3) - x² +2x
= x (5x² - x +2 )
H= -4x(3) - 8x²
= 4x² (-x - 2 )