132+9×11−8×18+20\sqrt{13^{2}+9\times11-8\times18+20}132+9×11−8×18+20 A10 B12 C15 D18 Show answer & explanationCorrect answer: BExplanation132+9×11−8×18+20=169+99−144+20=268−144+20=144=12\begin{aligned} \sqrt{13^{2}+9\times11-8\times18+20} &=\sqrt{169+99-144+20}\\ &=\sqrt{268-144+20}\\ &=\sqrt{144}\\ &=12 \end{aligned}132+9×11−8×18+20=169+99−144+20=268−144+20=144=12