Question

Efectuar
(x+5)^ 2-(x-5) ^2 -20x
Efectuar
(1+x)(x-1)-(4+x)(x-4)

Answer 1

Respuesta:

(x+5)²-(x-5)²-20x

10.2x-20x

20x-20x

= 0

(1+x)(x-1)-(4+x)(x-4)

(x+1)(x-1)-(x+4)(x-4)

x²-1-(x²-16)

x²-x1-x²+16

-1+16

= 15