Question
If (x + y) = 6 and (x2 + y2) = 20,
then the value of (x – y)2 is equal to:Solution
(x + y)2 = x2 + y2 + 2xy Or, 2xy = 62 – 20 = 16 Then, (x – y) = x + y – 2xy = 20 – 16 = 4 Â
More Algebra Questions
72 x 60 x 22 x 32 =?
If a³ - b³ = (a - b)(a² + ab + b²), find a³ - b³ when a = 10 and b = 4.
(√2704 x 55)/(245 + 120) =?
168Â Â Â Â Â 163Â Â Â Â Â Â 153Â Â Â Â Â Â 138Â Â Â Â Â 118Â Â Â Â Â ?
...? = 20% of 1200 + 256
√ 225 x 24 - √ 144 x 18 = ?
30% of 215 + 135% of ? = 469.5
[∛(3375/19683  )- ∛(125/1728  )  ] ÷ ∛(64/729)  = ? - 3/8Â
10 * 15 + 30% of 150 + 80% of 200 = ?
The value of 15 × 14 – 30 + (32 + 17) is:
Relevant for Exams:
