Réponses

2014-01-12T16:32:43+01:00
A) 25-16 x²
=(5+4x)(5-4x)

b) 25-(3x-2)
²
=(5-3x+2)(5+3x-2)
=(7-3x)(3+3x)
=3(7-3x)(1+x)

c)(4x-1)
² -(3x-2)²
=(4x-1-3x+2)(4x-1+3x-2)
=(x+1)(7x-3)