if the product of the roots of the equation xsquare - 3x+k= 10 is -2 then the value of k is .??
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Answered by
2
xsq.-3x+k=10
xsq.-3x+(k-10)=0
product of roots=c/a
=k-10/1
=k-10
k-10=-2
k=-2+10
k=8
xsq.-3x+(k-10)=0
product of roots=c/a
=k-10/1
=k-10
k-10=-2
k=-2+10
k=8
SARDARshubham:
hey, it is linear equation in one variable, hence there will be only one root
hi,sardar it is quadratic equation
ya its quadratic eqn bro
Answered by
4
x²-3x+k =10
x²-3x (k-10)=0
compare above equation with ax²+bx+c=0
a=1, b=-3,c=k-10
let the roots are α, β
product of the roots = c/a
αβ=k-10/1----(1)
given product = -2----(2)
k-10 =-2
k=-2+10
k=8
x²-3x (k-10)=0
compare above equation with ax²+bx+c=0
a=1, b=-3,c=k-10
let the roots are α, β
product of the roots = c/a
αβ=k-10/1----(1)
given product = -2----(2)
k-10 =-2
k=-2+10
k=8
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