Simplify 7−−√ 99.(1 point)
1 answer
To simplify $7-\sqrt{99}$, we first notice that $\sqrt{99} = \sqrt{9\cdot11}=\sqrt{9}\cdot\sqrt{11}=3\sqrt{11}$. Therefore, $$7-\sqrt{99}=7-3\sqrt{11}.$$ So the simplified expression is $7-3\sqrt{11}$.