6 + A - 2 =6 - 2 + A =
4+A
If I've read your question correctly, you need to subtract: a2 +2a -7 a2 -4a2 +5a2 -6 = 2a2 -6 Note, if x - y = z, then y = x - z; so: 2a2 -6 - (a2 -2a +1) = 2a2 -6 - a2 +2a -1 = a2 +2a -7
(a2 + 2)(b + 3)
a2 + 62 = 122 a2 + 62 - 62 = 122 - 62 a2 = 144 - 36 a2 = 108 taking the square root of each side, we get a equal plus or minus the square root of 108, or plus or minus 6 times the square root of 3.
( a2 ) ( a2+1 )
(a2 + a + a2) = (2a2 + a) = a (2a + 1)
a2 - 4a + 4
a2 + -5a2 - a2 - a = a2 - 5a2 - a2 - a = a2 - 6a2 - a = -5a2 - a
a2 + a2 = 2a2
(a2 + 5a + 6)/(a - 2) = (a + 2)*(a 3)/(a - 2) which cannot be simplified further. It can, however be written as (a2 - 2a + 7a - 14 + 20)/(a - 2) which is (a + 7) + 20/(a - 2)
a2+9a+20 = (a+4)(a+5) when factored
a2-8a plus 12, if done correctly according to calculus, results in the number 2.
a2+2a2b+2ab2+b2