Question

ayuda es para mañana

Answer 1

10.-

x²-10x + 9= -7

x² - 10x +9 + 7= 0

x² - 2x - 8x + 16= 0

x * (x - 2) -8 (x - 2)= 0

(x - 2) * (x-8) = 0

x-2=0

x-8=0

x=2

x=8

11-  

x²- 3x -3 = 7

x²- 3x -3 - 7= 0

x² + 2x - 5x - 10 = 0

x *(x + 2) -5 (x + 2) = 0

x + 2 = 0

x - 5 = 0

x= -2

x = 5