# Chapter 4 - Polynomials - Test: Chapter 4 - Page 300: 23

$\dfrac{7}{4}y^2-4y$

#### Work Step by Step

By combining like terms, the given expression, $y^2-3y-y+\dfrac{3}{4}y^2 ,$ simplifies to \begin{array}{l} \left( y^2+\dfrac{3}{4}y^2\right)+(-3y-y) \\\\= \dfrac{7}{4}y^2-4y .\end{array}

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