Va rog urgent dau corona sa fie bine si corect

Răspuns:
1. a)(x+3y)^2=x^2+6xy+9y^2
(2x+7)^2=4x^2+28x+49
(x-6y)^2=x^2-12xy+y^2
9x^2-30x+25
x^2-49y^2
25x-1
2.
(x+y)^2
(3x+4)^2
(x-2y)^2
(4x-5)^2
(x+11)(x-11)
(4x+6y)(4x-6y)