If y>0 and (3y-6)(y+1)=0, then y= | GMAT Sprint

Free Practice Question

PS · Problem Solving

505-555

Algebra

If $y>0$ and $(3y-6)(y+1)=0$ , then $y=$

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-1

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Explanation

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Official Explanation

Official

To solve the equation

(3y-6)(y+1)=0

, we set each factor to zero. First, we solve

3y-6=0

Add 6 to both sides:

3y=6

Divide both sides by 3:

y=2

Next, we solve

y+1=0

:…

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Comments

kaushikMar 24, 2025

good question

UthejApr 12, 2025

thanks

MdApr 22, 2025

Thank for sharing!

LavnishFeb 22, 2025

finally understood this

AmanMar 28, 2024

Can someone explain it other way?

ShubhankarJun 15, 2024

greatt question!

ManonJul 17

wait, is it really just solving for the zeros and picking the positive one? seems too easy for a 505-555, but i'll take it lol

PaulJul 28

ohh that makes sense, i was overthinking with the quadratic formula smh

What this question tests

What it tests

Your ability to manipulate linear and quadratic expressions, substitute unknowns, and solve equations under time pressure.

Common trap

Losing a sign when moving terms across the equals sign, or dividing both sides by a variable that could equal zero.

If y>0y>0y>0 and (3y−6)(y+1)=0(3y-6)(y+1)=0(3y−6)(y+1)=0, then y=y=y=