Question

Calcule

A) (3x + 5) . (2x+ 4)

B) (5x - 3) . (x + 5 )

C) ( 5x + 7) . (3x -2)

Answer 1

(3x+5)(2×+4)= 6x² +12x+10x+20 6x²+22x+20    (5x-3)(x+5)= 5x²+25x-3x-15 5x²+22x-15     (5x+7)(3x-2)= 15x²-10x+21x-14 15x²+11x-14