Question

efectuar :
a (x+8)(x+2)=
b (x+12)(x-13)=
c (2x+3)(2x+5)=
d (3x+8)(3x-11)=
e (7x-5)(7x-1)=
f (x²+8)(x²-3)=

Answer 1

a)
(x+8)(x+2) = x²+2x+8x+16
= x² + 10x +16

b) (x+12)(x-13)
= x² -13x + 12x - 156
= x² -x -156

c) (2x+3)(2x+5)
= 4x² + 10x + 6x + 15
= 4x² + 16x +15

d) (3x+8)(3x-11)
= 9x² -33x + 24x -88
= 9x² - 9x -88