(8х+3у)^2=64х^2+48ху+9у^2
(6м-4н)^2=36м^2-48мн+16н^2
(а^2+3х)^2=а^4+6ха^2+9х^2
(a^n -b^2m)(-a^n -b^2m) =
-a^2n +b^4m
1)(X-2)(x+2)
2)(5-3a)(5+3a)
3)(6m-10n)(6m+10n)
4)(0,2p-1,3q)(0,2p+1,3q)
5)(xy-2/3)(xy+2/3)
6)(a^2-b^3)(a^2+b^3)
.................................................................
40х+124.8=50.88+84х; -44х=-73.92; х=1.68