Question

4x-3/4+1-x/3=- 2
x+8/2+3-2x/5=3
x-3/2+2x-4/3=-1
3x-1/5-x+2/3=1

Answer 1

1)(x-y)²=x²-2xy+y²
(y-x)²=y²-2xy+x²
x²-2xy+y²=y²-2xy+x²
2)(-b-a)²=a²+2ab+b²
(a+b)²=a²+2ab+b²
a²+2ab+b²=a²+2ab+b²