Question

solve it by quadratic formula
2x^2-4x+5=0
2x^2+4x+7=0
3x^2-7x+3=0​

Answer 1

Step-by-step explanation:

Given,

2

x

2

+7x+5

2

=0

or,

2

x

2

+2x+5x+5

2

=0

or, x

2

(x+

2

)+5(x+

2

)=0

or, (x

2

+5)(x+

2

)=0

⇒x=−

2

5

,−

2

.

These are the required roots.