Question

2x²+10x-5=0,. solve it by substitution method​

Answer 1

Step-by-step explanation:

2

x

2

+

10

x

+

5

=

0

Use the quadratic formula to find the solutions.

−

b

±

√

b

2

−

4

(

a

c

)

2

a

Substitute the values

a

=

2

,

b

=

10

, and

c

=

5

into the quadratic formula and solve for

x

.

−

10

±

√

10

2

−

4

⋅

(

2

⋅

5

)

2

⋅

2

Simplify.

Tap for more steps...

x=−5±√15/2

The result can be shown in multiple forms.

Exact Form:

x=−5±√15/2

Decimal Form:

x

=

−

0.56350832

…

,

−

4.43649167

…