text: please answer this question for me. thank you.? (2y-7)2 -1   the two outside the parethesis stands for squared i could'nt make the 2 smaller. i think your question is to factorise the given quadratic polynomial . to show square of a number  you should use  the symbol-cap: ^ (obtained by pressing together the keys:shift 6) so the polynomial is: (2y-7)^2 -1  use (a+b)^2 = a^2 + b^2 +2ab (2y -7)^2 = (2y)^2 + 7^2 -2(2y)(7) polynomial= 4y^2 -28y +49-1 = 4y^2 -28y +48 =4y^2 - 16y -12y +48 = 4y(y-4) -12(y-4) =(4y-12)(y-4)