Question

(x-3)²=5 (x+7)

me ajudeeemm pfv

Answer 1

( x - 3) . ( x -3) = 5x + 35

x² -3x -3x +9 = 5x +35

x² -6x +9 -5x - 35=0

x² - 11x - 26=0

a= 1

b= -11

c= -26

∆= b² - 4.a .c

∆= (-11)² - 4 .1 . ( -26)

∆= 121 + 104

∆= 225

x= - b ±√∆/ 2.a

x= - ( -11) ±√225/2.1

x= 11 ± 15/2

x1= 11+15/2= 26/2= 13

x2= 11 - 15/2= -4/2= -2

S = { - 2 , 13}