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If \(x-y= R\) and \(xy=S,\) then \((x-2)(y+2)=\)

Expert replies
by Vincen » Tue Jun 30, 2020 7:35 am

Timer

00:00

Answers

A

B

C

D

E

Stats

Difficulty

If \(x-y= R\) and \(xy=S,\) then \((x-2)(y+2)=\)

A. \(R+S-4\)

B. \(R+2S -4\)

C. \(2R - S -4\)

D. \(2R + S - 4\)

E. \(R + S\)

[spoiler]OA=D[/spoiler]

Source: Official Guide
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Source: — Problem Solving |

re-writing the equation :
xy-2y+2x-4 => xy+2(x-y) -4 => S+2R -4
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