Question

(6) Ifa and are the roots of the equation 5x - 4x - 3=0, find the values of a+B and axb.​

Answer 1

Answer:

The two roots of the quadratic equation ax

2

+bx+c=0 are given by,

x=

2a

−b±

b

2

−4ac

For the given equation 5x

2

−4x−7=0,

b

2

−4ac=(−4)

2

−4(5)(−7)=16+140=156

So, the roots are,

x=

2(5)

4±

156

x=

10

4±2

39

x=

5

2±

39

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Answer 2

Answer:

A+B = 4/5, AB = - 3/5

Step-by-step explanation:

A+B= - b/a

= -(-4)/5 = 4/5

AB= c/a

= -3/5