X²-71X-72 BAGAIMANA CARA PENYELESAIAN

x² - 71x - 72
x² + 72x - x - 72
(x² + 72x)(- x - 72)
x(x + 72)- 1(x + 72)
(x - 1)(x + 72)

x1 :
x - 1 = 0
x = 1

x2 :
x + 72 = 0
x = - 72

Maaf Kalau Salah

x²-71x-72=0
-72= -72×1
-71=-72+1
(x-72)(x+1)

x-72=0
x=72

x+1=0
x=-1