b) (-2x+1)(x+4)+2(2x-1)(x+1)=0 (-2x+1)(x+4)-2(-2x+1)(x+1) = 0 (-2x+1)(x+4-2x-2) = 0 (-2x+1)(-x+2) = 0 revient a resoudre -2x+1 = 0 et -x+2=0 -2x = -1 et -x= -2 x = 0,5 et x=2
(3x-2)² = 16x² (3x-2)² -(4x)² = 0 (3x-2-4x)(3x-2+4x) = 0 (-x-2)(7x-2) = 0 revient a resoudre -x-2=0 ou 7x-2=0 -x=2 ou 7x=2 x=-2 ou x = 2/7
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Coucoub) (-2x+1)(x+4)+2(2x-1)(x+1)=0
(-2x+1)(x+4)-2(-2x+1)(x+1) = 0
(-2x+1)(x+4-2x-2) = 0
(-2x+1)(-x+2) = 0
revient a resoudre
-2x+1 = 0 et -x+2=0
-2x = -1 et -x= -2
x = 0,5 et x=2
(3x-2)² = 16x²
(3x-2)² -(4x)² = 0
(3x-2-4x)(3x-2+4x) = 0
(-x-2)(7x-2) = 0
revient a resoudre
-x-2=0 ou 7x-2=0
-x=2 ou 7x=2
x=-2 ou x = 2/7
voila j espere t avoir aider