Answer
$x^2+6x+8$
Work Step by Step
Use FOIL method.
$(x+2)(x+4)=x\cdot x+x\cdot 4+2\cdot x+2\cdot 4$
Simplify.
$=x^2+4 x+2x+8$
Combine like terms.
$=x^2+6x+8$
Hence, the single polynomial answer in standard form is $x^2+6x+8$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Appendix A - Review - A.3 Polynomials - A.3 Assess Your Understanding - Page A30: 45
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