Answer :
Let 4u² + 8u = 0
4u(u + 2) = 0
4u = 0 or u + 2 = 0
u = 0 or u = -2
sum of the roots = -b/a = -8/4 = -2
But sum of the roots = 0 + (-2) = -2
Product of the roots = c/a = 0 (As there is no c in the equation)
But, product of the roots = 0 × –2 = 0
4u(u + 2) = 0
4u = 0 or u + 2 = 0
u = 0 or u = -2
sum of the roots = -b/a = -8/4 = -2
But sum of the roots = 0 + (-2) = -2
Product of the roots = c/a = 0 (As there is no c in the equation)
But, product of the roots = 0 × –2 = 0
Given:
We have given an equation
To Find:
We have to find the zeroes of quadratic equation?
Step-by-step explanation:
- We have the given quadratic equation which is
[tex]4u^2+8u[/tex]
- For finding the zeroes of quadratic equation we will simplify the equation by factorization
take the common terms out from above equation
[tex]4u(u+8)[/tex]
- Now equate it with 0 we get
[tex]4u=0,u+2=0\\u=0,u=-2[/tex]
- Hence we get the zeroes are 0,-2
- Sum of zeroes is 0+(-2)=-2
- Product of zeroes=0(-2)=0
Now we will verify the relation by using formula
- comparing the given quadratic equation with [tex]ax^2+bx+c=0[/tex]
We get a=4 , b = 8
- Now sum of zeroes is given by the formula
- [tex]Sum=\frac{-b}{a} =\frac{8}{4} =-2[/tex]
- Product of zeroes is given by the foumla
[tex]\textrm{Product of zeroes}=\frac{c}{a} =0[/tex]
Hence, the zeroes are 0,-2 and sum is -2,product is 0