Subject
Quantitative Aptitude
Topic
Equation
if c2+ d2= 4 and (c-d)2= 2, what is the value of cd?
if c2+ d2= 4 and (c-d)2= 2, what is the value of cd?
ক)
1খ)
√2গ)
2ঘ)
3Explanation
here, c2+ d2= 4 and (c-d)2 = 2 so, (c-d)2 =c2+ d2-2cd or,2cd = (c2+d2)-(c-d)2 or2cd=4-2 or,2cd=2 so, cd=1Related questions
If (x-1)2= 400, which of the following could be the value of x-5?If x+5=4x-10, then x=?If 4x+3y=-2 and 3x+6=0, what is the value of y?If x/y = ½ and x+2y = 10, then x isif 2 /x =5 and 3/y= then x-y-?If A=7C/(B+50), then C=?If (2x+ 4y+ 6z)/6 =(x+ 2y)/2, then z=?If 2/x+3/y=9/xy and 4/x+9/y=21/xy. Then the value of x and y are?