So x2 - 6x + 9 = 0, Factorises as (x - 3)(x - 3) so only solution is x = 3
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6x plus 3 equals 8x plus 14 when solved mathematically is equal to x = -5.5.
-6x
x=10
The quadratic expression x2+6x+8 when factorised equals (x+2)(x+4)