<span>(a-25)^2 * (a+25)^2 = (а^2 - 50a + 625) * <span>(а^2 + 50a + 625) = a^4 + 50a^3 + 625a^2 -50a^3 - 2500a^2 - 31250a + 625a^2 + 31250a + 390625 = </span></span>
<span>уравнение первой степени</span>
√4 = √2² = 2
√6 = √(2*3) = √6
√8 = √(2² *2) = 2√2
√9 = √3² = 3
3,5d - 3,5n = 3,5( d - n )