sect magwe

solution set of {(x,y)|y=x2} {(x,y)|y=x+2} is
A. {(-1,1),(2,4)} B.{(-1,0),(2,0)} C.{(1,-1),(4,2)} D.{(0,-1),(0,2)} E. None of these

1. If a2+b2=4 and (a-b)2=2, what is the value of ab?
   A. 1 B.√2 C. 2 D. 3 E.4
   28.If x2-2x-15=(x+r)(r+s) for all value of x, one possible value for r-s is
   A.8 B. 2 C.-2 D. -3 E. -5
2. If ax2-bx-c=0, then x=………..
   A. (-b±√(b^2+4ac))/2a B. (-b±√(b^2-4ac))/2a C. (b±√(b^2-4ac))/2a D.(b±√(b^2+4ac))/2a E. None of these
3. The parabola y=x2-x-12 cuts the X-axis at A and B. The distance between A and B is
   A. 1 B. -1 C. 7 D. -7 E.12

……………………………………………………………………………………………………..Thank you!