courtboo960
courtboo960
25-04-2017
Mathematics
contestada
(5a-3) (4a+3)
A. 24
B. 22
C. 27
D. 20
Respuesta :
Аноним
Аноним
25-04-2017
(5a-3)(4a+3)
= 5a(4a+3)-3(4a+3)
= 20a^2 + 15a - 12a - 9
= 20a^2 + 3a - 9
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