Question

x^-5x-5 solve by formula method of class 10​

Answer 1

Step-by-step explanation:

- B ± √ B2-4AC

x = ————————

2A

In our case, A = 1

B = -5

C = -5

Accordingly, B2 - 4AC =

25 - (-20) =

45

Applying the quadratic formula :

5 ± √ 45

x = —————

2

√ 45 = √ 3•3•5 =

± 3 • √ 5

√ 5 , rounded to 4 decimal digits, is 2.2361

So now we are looking at:

x = ( 5 ± 3 • 2.236 ) / 2

Two real solutions:

x =(5+√45)/2=(5+3√ 5 )/2= 5.854

or:

x =(5-√45)/2=(5-3√ 5 )/2= -0.854