Question

5x² + 5x-1=0 by using formula methods ​

Answer 1

Answer:

» 5x² + 5x - 1 = 0

» x = [- 5 ± √(25 + 20)]/10

» x = (-5 ± 3√5)/10

Answer 2

Answer:

hey friend here is your answer!!!

Step-by-step explanation:

here,

a= 5, b=5, c= -1.

therefore,

b^2 - 4ac = (5)^2-4(5)(-1)

= (25)-(19)

= 6 ---------(i)

x= b^2+ under root b^2 -4ab ÷ 2a

= (5)^2 + under root (6) ÷ 2(5) --------[from(i)]

= 25 + under root 6 ÷ 25

= 1 + under root 6 ----(25 and 25 gets cancelled)

therefore,

x = -under root 6 or x = under root 6

hope it helps you!

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