If y^2 - (y + 2)^2 = b, what is y in terms of… | GMAT Sprint

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PS · Problem Solving

sub-505

Algebra

If $y^2 - (y + 2)^2 = b$ , what is $y$ in terms of $b$ ?

Correct answer marked below

b + 4

\frac{b + 4}{2}

-\frac{b + 4}{4}

Correct

\frac{b + 4}{2}

-\frac{b - 4}{2}

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Comments

deekshaJan 28, 2025

thanks

ChristopherFeb 25, 2025

thanks!

AymenApr 30, 2025

Amazing

JuanJan 15, 2025

Great

PatrickApr 13, 2024

taking my GMAT next month, this helps!

TJul 30

where do you get a 4y when expanding the square?

What this question tests

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

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