Sagot :
bonjour
a) x(x + 5)
=x²+5x
b)x(-x-5)
=-x²-5x
c) 3x(7x - 3)
=21x²-9x
d) (2x + 3)(5x + 4)
=10x²+8x+15x+12
=10x²+23x+12
e) (11x + 5)(x-3)
=11x²-33x+5x-15
=11x²-28x-15
f) (2x - 5)(3x - 6)
=6x²-12x-15x+30
=6x²-27x+30
h)(-7x-1)(-9x - 2).
=+63x²+14x+9x+2
=63x²+23x+2
g) (-7x-1)(-2x - 3)
=14x²+21x+2x+3
=14x²+23x+3
a) x(x+5)
a) x X x + x X5
a) x2 +5x
b) x(-x-5)
b) x X (-x) + x X (-5)
b ) -x2 - 5x
Je te laisse faire la suite c’est assez simple
a) x X x + x X5
a) x2 +5x
b) x(-x-5)
b) x X (-x) + x X (-5)
b ) -x2 - 5x
Je te laisse faire la suite c’est assez simple