Question

6.
Resolver:
(x + 4)2 = 2x(5x - 1) - 7(x - 2)
c)(-2; -1/9)
a) {2; 1/9}
d) {2; -1/9}
b) {1/9; -2}
e) NA
ayudenmen, por favor , con resolucion ​

Answer 1

Respuesta:

(x+4)²=2x(5x+1) -7(x-2)

x²+2(x)(4)+4²=10x²+2x-7x+14

x²+8x+16=10x²-5x+14

10x²-x²+8x-5x=14-16

9x²+3x=-2

9x²+3x-2=0

x=-(3)±√3²-4(9)(-2)/2(9)

x=-3±√9+72/18

x=-3±√81/18

x=-3±9/18

x₁=--3+9/18= 6/18=3/9=1/3

x₂=-3-9/18=-12/18=-6/9=-2/3