A) (8-a)²
(6+b) ²
(5a+1) ²
(6c-2)²
б) (8x+8y)²
(6m-5n)²
(17x - 12a)²
(a²+4x)²

$(8-a)^2=64-16a+a^2$
$(6+b)^2=36+12b+b^2$
$(5a+1)^2=25a^2+10a+1$
$(6c-2)^2=36c^2-24c+4$
$(8x+8y)^2=64x^2+128xy+64y^2$
$(6m-5n)^2=36m^2-60mn+25n^2$
$( frac{1}{7x} - frac{1}{2a} )^2= frac{1}{49x^2} -2 frac{1}{14ax} + frac{1}{4a^2}$
$(a^2+4x)^2=a^4+8a^2x+16x^2$