Necesito resolver esta ecuacion 8x-(7x^2+2)=7.(5-x).(3+x).... Question from @valerimerce

Articles
Register

August 2018 2 51 Report

Necesito resolver esta ecuacion
8x-(7x^2+2)=7.(5-x).(3+x)

jkarlos 8x-(7x²+2)=7(5-x)(3+x)
-7x²+8x-2=7(-x²-3x+5x+15)
-7x²+8x-2=7(-x²+2x+15)
-7x²+8x-2= -7x²+14x+105
-7x²+7x²+8x-14x=105+2
-6x= 107
x= - 107
6

solucion: x= -107/6

1 votes Thanks 1

Piscis04 $8x-(7x^2+2)=7 (5-x)(3+x) \\ \\ 8x - 7x^2 - 2 = 7 (15+5x-3x-x^2) \\ \\ 8x - 7x^2 - 2 = 105+35x-21x-7x^2 \\ \\ 8x - 7x^2 -35x+21x+7x^2= 105 +2 \\ \\ -6x= 107 \\ \\ \boxed{x=- \frac{107}{6} }$

Espero que te sirva, salu2!!!!

1 votes Thanks 2