F(x)=x²+2x-5 F(2)-F(3)=

F(2) = 2² + 2(2) - 5
        = 4 + 4 - 5
        = 8 - 5
        = 3
F(3) = 3² + 2(3) - 5
        = 9 + 6 - 5
        = 15 - 5
        = 10
F(2) - F(3) = 3 - 10
                 = -7

[tex]f(x) \: = \: {x}^{2} + 2x - 5 \\ f(2) = {2}^{2} + 2 \times 2 - 5 \\ = 4 + 4 - 5 \\ = 3 \\ f(3) = {3}^{2} + 2 \times 3 - 5 \\ = 9 + 6 - 5 \\ = 10 \\ \\ sehingga \: \\ f(2) - f(3) \\ = 3 - 10 \\ = - 7[/tex]