Question

determined the nature route of quadratic equation (2x)2-5x+7=0

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Answer 1

Answer:

hii bahi follow kar na .................

Answer 2

Step-by-step explanation:

One way to find the number of roots is by the graph. It is clear that the graph crosses the x-axis at 2 different values of x. Therefore there are 2 roots.

graph{2x^2+5x-7 [-20, 20, -12,12] [-20, 20, -12, 12]}

The give equation is

2

x

2

+

5

x

−

7

=

0

By factoring method,

2

x

2

+

5

x

−

7

=

0

(

2

x

+

7

)

(

x

−

1

)

=

0

by the zero property

2

x

+

7

=

0

and

x

−

1

=

0

it follows

the roots are

x

=

−

7

2

and

x

=

1

It can also be checked from the graph the points

(

−

7

2

,

0

)

and

(

1

,

0

)

God bless...I hope the explanation is useful.

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