Question

x²-14x=15 (formula de Bhaskara)

Answer 1

X^2-14x-15=0 delta=b^2-4a.c delta=(-14)^2-4.1.(-15) delta=196-4.(-15) delta=196+60 delta=256 Bascara x=-b+-raiz quadrada de delta/2.a x=-(-14)+- raiz de 256/2.a X=14+-16/2 x'=30/2 x'=15 x''=14-16/2 x''=-2/2 x''= -1

Answer 2

x² - 14x = 15

x² - 14x - 15 = 0

A= 1

B= - 14

C= - 15

∆= b² - 4ac

∆= ( - 14)² - 4 • 1 • ( - 15)

∆= 196 + 60

∆= 256

x= - b ± √∆ / 2a

x= - ( - 14) ± √256 / 2 • 1

x'= 14 + 16/2 = 30/2 = 15

x''= 14 - 16/2 = - 2/2 = - 1

S= ( - 1 , 15)