Question

Спростіть вираз (4a+3) в квадрати -(2a+1) (4a-3)

Answer 1

(4а+3)²-(2а+1)*(4а-3)=

(4а)²+2*4а*3+3²-(8а²-6а+4а-3)=16а²+24а+9-8а²+6а-4а+3=8а²+26а+12