How do you combine 20- ( 7+ \sqrt { 16} )?

1 Answer
seol
Aug 1, 2017

13\pm4

Explanation:

20-(7+\sqrt{16})
20+(-1)(7+\sqrt{16})
distributing 20+(-1)(7)+(-1)(\sqrt{16})
simplify 20-7-\sqrt{16}
combine like terms 13-\sqrt{16}
evaluate square root 13\pm4 ♦

♦ depends on whether you are required to signify both values of a square root: \sqrt{x^2}=\pmx

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