Answer
$20x^{2}-x-30$
Work Step by Step
Step 1: $(4x-5)(5x+6)$
Step 2: We will use the FOIL approach to multiply the two polynomials together.
Step 3: $4x(5x)+4x(6)-5(5x)-5(6)$
Step 4: $20x^{2}+24x-25x-30$
Step 5: $20x^{2}-x-30$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Appendix A - Exercise Set - Page 976: 36
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