The solution set of x2-6x+5=4 is
A. {(1,5)} B. {2√3+3} C. {3±2√3} D.{3-2√3} 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 x2-2x/3 in order to be a perfect square is
If a:b=3:8 and b:c=4:5, then a:c=…………..
A. 5:11 B. 3:8 C. 3:11 D. 3:10 E. 5:8 - If a:b=3:5 and b:c=3:5, then a:b:c=………
A. 2:3:5 B.3:5:7 C.6:10:15 D. 9:15:25 E.9:20:27 - If a:b = 5:3 , then 3a+ 4b: 4a+3b is
A. 27:36 B. 29:27 C. 27:29 D. 26:29 E. 17:19 - If 2x +3y:2x+y=3:2, then x:y=……….