Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 8 - Polynomials and Factoring - Pull it All Together - Page 522: Task 2


$SA = 10x^2+38x+30$

Work Step by Step

$SA = 2*w*l + 2*w*h + 2*h*l$ $SA = 2*(x)(2x+5) + 2*(2x+5)(x+3)+2*(x)(x+3)$ (replacing variables with dimensions) $SA = 2*(2x^2+5x)+2*(2x^2+6x+5x+15)+2*(x^2+3x)$ (distributing the variables) $SA = 4x^2+10x+4x^2+12x+10x+30+2x^2+6x$ (simplifying the variables) $SA = 10x^2+38x+30$ (combining like terms)
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