If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored
x squared -2x-3 equals 0 is the same as (x + 1)(x - 3) = 0
'20 squared' simply means 20 multiplied by itself (20 x 20). This equals 400.
(x - 6)(x - 2)
63
If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored
(x + 2)(x - 3)
x squared -2x-3 equals 0 is the same as (x + 1)(x - 3) = 0
'20 squared' simply means 20 multiplied by itself (20 x 20). This equals 400.
x2 - x = 20 x = 5
(x + 5)(x + 5)
23
(x - 6)(x - 2)
63
4, -5
Simple. When a number is 'squared' it simply means it is multiplied by itself. So, '20 squared' means 20 x 20, which equals 400.
Factor out -2: -2(x squared +11x-20). This is fully factored.