The quadratic expression x2+6x+8 when factorised equals (x+2)(x+4)
(x + 4)(x +4) or (x + 4)squared
x(x+4) equals x2 plus 4x
4
(2-r)e-rr
4
x2-5x+4 = (x-1)(x-4) when factord
x2+4x+4 = 25 x2+4x+4-25 = 0 x2+4x-21 = 0 (x+7)(x-3) = 0 x = -7 or x = 3
4 x 2 + 4 = 12 x = 4
(x + 3)(x + 4)
the graph is moved down 6 units
If you have an equation of x2 plus x2, it is the same as saying 2 times x plus 2 times x. This can be written as 2x + 2x or x2 + x2. It is the same, then, as 4x. For example, if x equals 5: 2(5) + 2(5) = 10 + 10 = 20. 20 also equals 4(5).