# Appendix A - A.2 - Formulas and Equations - Exercises - Page 540: 7

$x^2 + 7x + 12$

#### 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. $(x+3)(x+4) = x\times x + x\times 4 + 3\times x + 3\times 4 = x^2 + 7x + 12$

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