Elementary Technical Mathematics

Published by Brooks Cole

Chapter 5 - Section 5.3 - Addition and Subtraction of Polynomials - Exercise - Page 221: 32

Answer

$11x^4 -18x^2+5$

Work Step by Step

We simplify by removing the parentheses and then add the like terms as follows: $$(3x^4 - 5x^2 + 4) + (6x^4 - 6x^2 + 1) + (2x^4 - 7x^2)\\ =3x^4 - 5x^2 + 4 + 6x^4 - 6x^2 + 1 + 2x^4 - 7x^2\\ =11x^4 -18x^2+5 .$$

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