How do you solve..?

Question

[(x-1)+y]^2

I meant simplify, sorry. <><

Answer 1

Hi sweethear;
just look what am doing dear;am sure u have seen this b4
(a + b) ^2= a^2 + 2ab + b^2

if a = (x-1) & b = y
so we have ;
(x-1) ^2 + 2*(x-1)(y) + y^2

{ consider you have (x-1)^2 as well just solve it like that}
[ (x-1)^2 = x^2 - 2x + 1 , fill it in to the first formula]
{2(x-1)(y) = 2xy -2y , and again fill it in to the first formula as well}

[ x^2 -2x+1 ] + [ 2xy - 2y] + y^2
x^2 - 2x + 2xy - 2y + y^2
[ here you factor 'x' & 'y' & -2]

(x+y-2)(x+y)

Good Luck.

Answer 2

Well you can expand it.
(x-1)^2+2(x-1)y+y^2 and so on.
You cannot solve for x or y, because the expression is not equated to a value. Moreover, you need two equations to solve for 2 variables.
It is already a simplified form. The form is (x+y-1)^2.You can expand it to get
x^2+y^2+1+2(xy-x-y)