Answer:
25x² + 40x + 16
Step-by-step explanation:
use the method FOIL
F-FIRST
O- OUTSIDE
I- INSIDE
L- LAST
(5x+4) (5x+4)
F- 5ו5x = 5x²
O- 5x•4 = 20x
I- 4•5x= 20x
L- 4•4= 16
5x²+20x+20x+16
= 5x²+40x+16
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Answers & Comments
Answer:
25x² + 40x + 16
Step-by-step explanation:
use the method FOIL
F-FIRST
O- OUTSIDE
I- INSIDE
L- LAST
(5x+4) (5x+4)
F- 5ו5x = 5x²
O- 5x•4 = 20x
I- 4•5x= 20x
L- 4•4= 16
5x²+20x+20x+16
= 5x²+40x+16