(2x+3y)^2=(x^2+3)^2=a^2-9=x^2-4y^2=9x^2+4=

Question

(2x+3y)^2=
(x^2+3)^2=
a^2-9=
x^2-4y^2=
9x^2+4=

Answer 1

1)(2x+3y)²=4x²+12xy+9y²
2)(x²+3)²=x⁴+6x²+9
3)a²-9=(a-3)(a+3)
4)x²-4y²=(x-2y)(x+2y)
5)9x²+4=(3x+2)²-12xy

Comments

спасибо^^