Question

Solve by completing the square, leave you answer in surd form:
(a) 2x^2 + 4x − 1 = 0
please show full working and calculation

Answer 1

Step-by-step explanation:

If you are student of class 10 cbse board

you dont have to study completing the sq methord

instead you can use the quadratic eqn to solve this.

bcz board has removed the topic nd its not needed. Sorry if you are not a class 10 cbse student

Answer 2

Step-by-step explanation:

2x²+4x-1=0

2x²+4x=1

dividing both side by 2

x²+2x=1/2

adding 1 both side

x²+2x+1=3/2

(x+1)²=3/2

x+1=√3/2(positive and negative

x= -√3/2-1 or √3/2-1