Answer
$x^2 + 7x + 12$
Work Step by Step
By using the FOIL method, we multiply the first, outside, inside, and the last element of each bracket and we add them.
$(x+3)(x+4) = x\times x + x\times 4 + 3\times x + 3\times 4 = x^2 + 7x + 12$
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Appendix A - A.2 - Formulas and Equations - Exercises - Page 546: 7
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