Question

ME AJUDEM RÁPIDO PFF

Answer 1

(3x+5y)^2
9x^2+30xy+25y^2

(6x-7y)^2
36x^2-84xy+49y^2

(5x+3y).(5x-3y)
25x^2-15xy+15xy-9y^2
25x^2-9y^2

(9x^2+30xy+25y^2)-(36x^2-84xy+49y^2)
9x^2+30xy+25y^2-36x^2+84xy-49y^2
9x^2-36x^2+30xy+84xy+25y^2-49y^2
(-27x^2+114xy-24y^2)+(25x^2-9y^2)
-27x^2+25x^2+114xy-24y^2-9y^2
-2x^2+114xy-33y^2


Item a)