Question

simplifique as expressões abaixo:
A) 3a(a -b ) -2a (a+b
) ..
B) 2x(x- + (x-5 ..

C) (X-3)•(x-5+3×(x+4 ..

D)(a+b)•(a-b+(a-2b•(a+5b).

Answer 1

$A) 3a(a-b)-2a(a+b)= 3a^{2}-3ab-2a^{2}-2ab=a^{2}-5ab$