If \(x^2 + 3x + 3 = 5x + 6\) then \(x\) equals

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M7MBA: Moderator; Posts: 2058; Joined: Sun Oct 29, 2017 4:24 am; Thanked: 1 times; Followed by:5 members

by M7MBA » Sun Nov 29, 2020 12:32 am

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If \(x^2 + 3x + 3 = 5x + 6\) then \(x\) equals

A. -1 or 3

B. -1 or 4

C. 0 or 3

D. 0 or 6

E. 1 or 3

Answer: A

Source: EMPOWERgmat

Source: Beat The GMAT — Problem Solving | Sun Nov 29, 2020 12:32 am

mathisfun: Newbie | Next Rank: 10 Posts; Posts: 2; Joined: Sun Nov 29, 2020 10:52 am

by mathisfun » Sun Nov 29, 2020 10:57 am

x^2 + 3x + 3 = 5x + 6
x^2 -2x -3=0
x^2 -3x + x-3 =0
x(x-3) + 1(x-3)=0
x= 3 or -1

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