Question

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

Answer 1

1)Resolvemos por partes.

(x-7)²=x²-2(x)(7)+7²=x²-14x+49

-(1+x)²=-(1²+2(1)(x)+x²)=-(1+2x+x²)=-1-2x-x²

2(3x-4)=6x-8

2)Resolvemos

x²-14x+49-1-2x-x²=6x-8
-16x+48=6x-8
48+8=6x+16x
56=22x
x=56/22  ←Simplificamos
x=28/11

Espero que sirva!Saludos!

Answer 2

Respuesta:

Explicación paso a paso:

1)Resolvemos por partes.

(x-7)²=x²-2(x)(7)+7²=x²-14x+49

-(1+x)²=-(1²+2(1)(x)+x²)=-(1+2x+x²)=-1-2x-x²

2(3x-4)=6x-8

2)Resolvemos

x²-14x+49-1-2x-x²=6x-8

-16x+48=6x-8

48+8=6x+16x

56=22x

x=56/22  ←Simplificamos

x=28/11