The simplified form of the given radicals is -23
From the question, we are to combine the given radicals
The given radicals are
[tex]-3\sqrt{81} +\sqrt{16}[/tex]
NOTE: [tex]\sqrt{81 }= 9[/tex] and [tex]\sqrt{16} = 4[/tex]
∴ [tex]-3\sqrt{81} +\sqrt{16}[/tex] becomes
-3(9) + 4
= -27 + 4
= -23
Hence, the simplified form of the given radicals is -23
Learn more on Simplifying an expression here: https://brainly.com/question/8461998
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