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# AoPS Wiki:Problem of the Day/June 30, 2011

If $9a+3b+3=0$, then which expression is equivalent to $36a^2+b^2+12ab$? $\text{(A)}\ b^2-12a \qquad \text{(B)}\ b^2-15a^2 \\ \text{(C)}\a^2-9b \qquad \text{(D)}\ a-16b \\ \text{(E)}\ a^2-18b$ (Error compiling LaTeX. ! Please use \mathaccent for accents in math mode.)