Question

if A and B are the roots of quadratic equation X square + 3 X + 4 = 20 then a + b equals to​

Answer 1

Answer:

Step-by-step explanation:

Let, x=1.3  

23

.

Then, 10x=13.  

23

(1)

                 =13.23  

23

 

and 1000x=1323.  

23(2)

Now, subtracting  (1) from (2) we get,

990x=1310

⇒x=  

990

1310

​

=  

99

131

​

 

Which is the required  

q

p

​

 form

Answer 2

Answer:

-3

Step-by-step explanation:

x^2+3x+4=20

x^2+3x+4 -20=0

x^2+3x-16=0

a=1,b=3,c= -16

A,B are the roots of the equation

Sum of the roots= -(b)÷a =》A+B= -(b)÷a

=》A+B= -(3)÷1

=》A+B= -3

Here is the solution

Hope this helps u