If √(x-1) = 4; then x =
16
15
17
-4
Square root of
Product of the roots of the equation 2 x2-3 x = 5 is
-3/2
3/2
5/2
-5/2
Frame an equation in x having 2 and -3 as roots.
x2+x+6=0
x2-x-6=0
x2-6=0
x2+x-6=0
Nature of roots of the equation 4 x2- 4 x + 1 = 0 is
Real and equal
Irrational
Complex
Real and unequal
First order homogeneous expression (x,y,z as variables) is
a x + b z
a y + a z
a z + b y + c z
a ( xyz )
IF x+1/x= a, then x2+ 1/x2 =
a2-2
a2+2
a2
a2+1
If 5 is a root of the equation x2- (k-1) x+10 =0; then the value of k=
-5
7
6
8
If a x2 + b x + c is a perfect square, then
a2 = 4 bc
b2 = 4 ac
a = 4 c
b2 = 4 a
Sum of the roots of the equation 4 x2 -1 = 0 is
-1/4
0
1/4
4
