Question

5xsquare -4x-5 factorise

Answer 1

•5x²-4x-5=0
->by sridharacharya's formula,
a=5 b=-4 and c=-5
x= {-b±[b²-4ac]½}/2a
•x={-(-4)±[(-4)²-4(5)(-5)]½/2(5)
•x={4±(116)½]/10
•x=[2±√29]/5

Answer 2

Discriminant = b²-4ac

where a= 5
b= -4
c= -5
D = 16-4(5)5
D= 16-100= -84

The discriminant of this quadratic equation is
-ve

so .....
this quadratic equation has no real roots

Hope this helps you....