# Chapter 1 - Section 1.3 - Complex Numbers - 1.3 Exercises - Page 103: 61

$7$

#### Work Step by Step

Use the FOIL method to multiply the binomials. $6-i\sqrt{6}+i\sqrt{6}-i^2$ Substitute $-1$ for $i^2$. Also, add/subtract like terms. $6-(-1)$ Simplify. $7$

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