Question

15x2+2x-13 formula de bhaskara

Answer 1

15x²+2x-13=0

a=15
b=2
c=-13

DELTA= b²-4.a.c
DELTA= 2²-4.15.(-13)
DELTA= 4+780
DELTA= 784

x= -b +/- raiz de delta / 2a
x= -2 +/- raiz de 784 / 2.15
x= -2 +/- 28 / 30

x'= -2+28/30
x'= 26/30
x'= 13/15

x''=-2-28/30
x''= -30/30
x''= -1

Answer 2

15x² + 2x - 13 = 0

A= 15

B= 2

C= - 13

∆= b² - 4ac

∆= 2² - 4 • 15 • ( - 13)

∆= 4 + 780

∆= 784

x= - b ± √∆ / 2a

x= - 2 ± √784 / 2 • 15

x'= - 2 + 28/30 = 26/30 = 13/15

x'= - 2 - 28/30 = - 30/30 = - 1

S= ( 13/15 , - 1)