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If x^(2) - y^(2) = 28 and x + y = 7 then...

If `x^(2) - y^(2) = 28` and x + y = 7 then `(x - y)^(2) = "_________"` .

A

8

B

4

C

16

D

12

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • If x + y = 7 and xy = 2 , then x^*(2) - y^(2) = "_________" (x gt y)

    A
    `7sqrt(46)`
    B
    `7sqrt(44)`
    C
    `7sqrt(41)`
    D
    `7sqrt(43)`

  • If x -y =- 7 and x + y = 13, then x ^(2) - y ^(2) is

    A
    91
    B
    30
    C
    `-30 `
    D
    `-91`

  • If x + y = 7 and xy = 6 then value of x ^(2) + y ^(2) is

    A
    37
    B
    36
    C
    `-36`
    D
    `-37`

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