a2 + b2 + c2 = 2(3a -5b -6c)-70 So a2 + b2 + c2 -2×3a +2 ×5b + 2×6c +70 = 0 a2 -2×3a +9 + b2 +2 ×5b+25 +c2 +2×6c+36 = 0 So (a-3)2 +(b+5)2+(c+6)2 = 0 As we know that if x2 + y2 +z2 = 0 then x=y=z = 0 So here a-3 = 0 so a =3; b +5 = 0 so b = -5 And c+6 =0 so c = -6 So now a-b-c = 3-(-5)-(-6) = 3+5+6 = 14
What will be the value of expression if the numbers/digits ‘(42)’ and ‘(18)’ are interchanged?
54 ÷ 42 × 10 + 18 – 12 + 20
...If ‘$’ means ‘÷’, ‘#’ means ‘×’, ‘@’ means ‘-’ and ‘%’ means ‘+’, then the value of 65 @ 21 $ 3 # 5 % 7
...Which two signs should be interchanged to make the given equation correct?
15 ÷ 6 - 10 x 5 + 11 = 99
Which signs should be interchanged to make the given equation correct.
51 ÷ 3 + 17 x 14 - 2 = 6
What will come in place of ‘?’ in the given expression?
13 × 11 + 12² + 27 × (2/3) = ?
Which two signs should be interchanged to make the following equation correct?
48 – 114 ÷ 3 + 6 × 7 = 44
If x stands for ‘addition’, ÷ stands for ‘subtraction’, + stands for ‘multiplication’, and – stands for ‘division’, then 80 x 54 –...
Monthly income of A is Rs. 6000 and he saves 25% of his monthly income. If monthly expenditure of A is decreased by 35% while his monthly savings is inc...
A seller sold a vehicle for Rs. 81,000 with the loss of 10%. At what price be sold to earn 10% profit?
If ‘A’ denotes ‘÷’, ‘B’ denotes ‘x’, ‘C’ denotes ‘+’ and ‘D’ denotes ‘-’.Then find the value of 12 B 9 A 3 C 28 ...
