3n2 + 2n - 5
That's a second degree trinomial expression that represents a number. The number
it represents depends on the value of 'n', and it changes whenever 'n' changes, but
it's never less than -51/3 .
Both the expression and the number are the product of (3n + 5) and (n - 1) .
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3n2-8n+4 = (3n-2)(n-2) when factored
3 + 3n = 9 + 2n + 4n n = -2
41 - 2n = 2 + n Add 2n to each side: 41 = 2 + 3n Subtract 2 from each side: 39 = 3n Divide each side by 3: 13 = n
3n + 2n = 25 5n = 25 n = 5
3n+18 !