Seudónimo Seudónimo 06-07-2021 Mathematics contestada PLS PLS PLS PLS PLS PLS PLS HELP I DON'T GET IT!!! Write missing monomials to make an identity: A) (.....+2a)^2=.....+12ab+4*.... B) (3x+.....)^2=....*x^2+.....+49y^2