f(x) = 2x2-6x maka f(x+1)=..

[tex]f(x) = 2x {}^{2} - 6x \\ \\ f(x + 1) : \\ = 2( x+ 1) {}^{2} - 6(x + 1) \\ = 2(x {}^{2} + 2x + 1) - 6(x + 1) \\ = 2x {}^{2} + 4x + 2 - 6x + 6 \\ = 2x {}^{2} - 2x + 8[/tex]