Question

(2y+3)(2y-3)-(1+2y)2 при y=0,5

Answer 1

$(2 times 0.5+ 3)(2 times 0.5 - 3) - (1 + 2 times 0.5) times 2 \ (1 + 3)(1 - 3) - (1 + 1) times 2 \ 4( - 2) - 2 times 2 \ - 4 times 2 - 2 times 2 \ - 2(2 times 2 + 2) \ - 2(4 + 2) \ - 2 times 6 \ - 12$