This math question is ambiguous. Furthermore, there is no actual answer. It's like asking what is 2*x + 3*y? The answer to that question is 2*x + 3*y. Without further information, your question answers itself.
(a - 2b)(2a - b)
2
5
sqrt(4a2) = 21plus or minus (2a) = 21plus or minus (a) = 10.5a = +10.5a = -10.5
If your Problem is organized like this: A x squared plus B x plus C, the equation is: (B plus or minus the square root of(B squared minus 4 A C)) over 2A
(a - 2b)(2a - b)
2
5
6a to the second power minus 8ab + 2a
sqrt(4a2) = 21plus or minus (2a) = 21plus or minus (a) = 10.5a = +10.5a = -10.5
x equals negative b plus or minus the square root of b squared minus 4bc over 2a
If your Problem is organized like this: A x squared plus B x plus C, the equation is: (B plus or minus the square root of(B squared minus 4 A C)) over 2A
The quadric equation is: negative b plus or minus the square root of b squared minus 4ac all over(divided by) 2a
2a-5
2a - a = a
(2a + 1)(4a2 - 2a + 1)
(2a + b)(a + 3b)