Answer
$7x^2+28x$
Work Step by Step
We start with the given expression: $7x(x+4)$
We apply the distributive property: $7x\times x+4\times7x$
We multiply the coefficients and add the exponents: $7x^2+28x$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 8 - Polynomials and Factoring - 8-2 Multiplying and Factoring - Practice and Problem-Solving Exercises - Page 483: 9
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