# Chapter 4 - Polynomials - 4.2 Negative Exponents and Scientific Notations - 4.2 Exercise Set: 120

$7$

#### Work Step by Step

Subtract each term of the binomial to obtain: $=x-x-(-7) \\=x-x+7$ Combine like terms to obtain $=(x-x)+7 \\=0+7 \\=7$

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