(6х³у - х² + 3ху²) - (3х³у - 5х² - 2ху²) = 6х³у - <em>х²</em> + <u>3ху²</u> - 3х³у + <em>5х²</em> + <u>2ху²</u> = 3х³у + 4х² + 5ху²
B²/(6a-b)(6a+b) : b/6a-b= b²/(6a-b)(6a+b)*(6a-b)/b сокращаем = b/6a+b
(b-5)^2 = b^2 - 10b + 25
2) (4a+c)^2 = 16a^2 + 8ac + c^2
3) <span>(6x-y) (6x+y) = 36х^2 + 6ху - 6ху - у^2 = 36х^2 - у^2</span>
<span>4) = p^4 - q^2</span>
<span>^ - cтепень</span>