N. {-13} C. {13, -13} D.∅ E. None of them
- The solution set of x2-6x+5=4 is
A. {(1,5)} B. {23+3} C. {3±23} D.{3-23} E. None of these
7.x2-0.4x+k is a perfect square if k=……….
A. 0.4 B. 0.04 C.-0.04 D.-0.4 E. 0.2
- x2-6x+k=(x+2)2, then
A. k=3,a=-3 B. k=9,a=3 C. k=-9,a=-3 D. k=9,a=-3 E. k=3,a=9
- x2+8x+10+k is a perfect square if k=………..
A. -1 B.6 C.15 D.26 E .None of these
- Which must be added to x2-2x3 in order to be a perfect square is
A.422 B. 232 C. 32 D. 342 E.132
- A quadratic equation with roots -3 and 5 is
A.x2-15=0 B. x2-8x-15=0 C.x2+8x-15=0 D. x2+2x-15=0 E. x2-2x-15=0
- A quadratic equation with solution set {13,14} is
A.12x2=7x+1 B.12x2=7x-1 C.12x2=x+1 D.12x2=x-1 E.12x2=1-x
- The solution set of the system of equation x-y=3, x2-y2=21 is
A.{(2,5)} B.{(5,2)} C. {5,2} D.{(2,5),(5,2)} E. None of these
14.The solution set of the system of equation x-y=0,x2+y2=8 is
A.{(2,-2),(-2,2)} B.{(-2,2),(2,-2)} C.{(2,2),(-2,-2)} D.{(2,5),(5,2)} E. None of these
- The root of standard quadratic equation is real if
- b2-4ac<0 2. b2-4ac=0 3. b2-4ac>0
A. 1 only B. 2 only C. 3 only D. 1 and 2 only E.2 and 3 only
- p2+q2=…………
A.(p+q)2 B.(p-q)(p-q) C.(p-q)2+2pq D.(p-q)2-2pq E. None of these
17.If a2+2ka +16 is a perfect square , then k=…..
A.-2 B.2 C. -4 D. 8 E. 16
- If x2+2x-24 =(x-a)(x-b), when a>b , then
A. a=4,b=-6 B. a=6, b=-4 C. a=6 ,b=4 D. a=6, b=-6 E. a=-4, b=-6
- The solution set the system of equation x2-
