If 3x² + 27 = -18x, what is x? A. -9 B. -3 C. 0 D. 6 E. 9 (B) Look at the equation carefully. It is a quadratic equation, so it must be set equal to zero in order to solve for x. If we add 18x to both sides of the equation, we'll get: 3x² + 18x + 27 = 0.
We can now factor out a 3: x² + 6x + 9 = 0.
This can be factored further: (x + 3)(x + 3) = 0, so x = -3.
The correct answer is choice (B). ---------- The equation is incorrect. It should be 3x² + 18x + 27.
Users browsing this forum: No registered users and 0 guests
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum
GMAT(TM) and GMAT CAT (TM) are registered trademarks of the Graduate Management Admission Council(TM). The Graduate Management Admission Council(TM) does not endorse, nor is affiliated in any way with the owner or any content of this site.