Question

Please solve the following quadratic equation using the quadratic formula ;

" 50x^2 - 400x - 19200 = 0
,
I am getting the values of x as : 23.6 and -15.6 BUT as per the answer the values of x are ; 24
and - 16 !!!!​

Answer 1

Answer:

50x²-400x-19200=0

a=50, b=-400, c=-19200

x=-b±√b²-4ac/2a

x=-(-400)±√(-400)²-4(50)(-19200)/2(50)

x=400±√1,60,000+38,40,000/100

x=400±√40,00,000/100

x=400±2000/100

x=400+2000/100 or x=400-2000/100

x=2400/100 or x=-1600/100

x=24 or x=-16