Раскрой скобки : (-z-3)^2 , (2a+1)^2 , (3c-2)^2 , (8x+3y)^2, (6m-4n)^2

Question

Раскрой скобки : (-z-3)^2 , (2a+1)^2 , (3c-2)^2 , (8x+3y)^2, (6m-4n)^2

Answer 1

1) z^2+6z+9
2) 4a^2+4a+1
3) 9c^2-12c+4
4) 64x^2+48xy+9y^2
5) 36m^2-48mn+16n

Answer 2

1) (-z-3)^2 = (-z-3)(-z-3)=z^2+6z+9
2) (2a+1)^2 = (2a+1)(2a+1)= 4a^2+4a+1
3) (3c-2)^2 = (3c-2)(3c-2)= 9c^2 -12c+4^2
4)(8x+3y)^2 = (8x+3y)(8x+3y)= 64x^2+54xy+9y^2
5)(6m-4n)^2 = (6m-4n)(6m-4n)= 36m^2-48mn+16n^2