Question 1
Short Answer
다음 식을 전개하라.
25x^2+30xy+9y^2

25x^2+30xy+9y^2
x^2-4xy+4y^2
36a^2+84ab+49b^2
4x^2+28xy+49y^2
25a^2-30ab+9b^2
(x+2y)^2
4(x+y)^2
(2x-y)^2
(a+2b)^2
4(2a-3b)^2
9x^2/4+6xy+4y^2
4x^2/49-2xy+49y^2/4
(5x-3y)^2
(a/3-3/a)^2
(3x/4+3y/2)^2
4x^2
6xy
49v^2
4ab
36b^2