Выполните умножение:
(a+b)(2a+3b)
(6z-y)(2z-y)
(4m+3n)(4m+3n)
(3y-2v)(3y+2v)

2а^2+3ab*2ab+3b^2=2a^2+6a^2b^2+3b^212z^2-6zy*(-2zy)+y^2=12z^2+12z^2y^2+y^216m^2+12mn*12mn+9n^2=16m^2+144m^2n^2+9n^29y^2+6vy*(-6vy)+4v^2=9y^2+36v^2y^2+4v^2