Respuesta :

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13 ) Go...

[tex]f(x) = {x}^{2} - 2x[/tex]

[tex]0 = {x}^{2} - 2x[/tex]

[tex] {x}^{2} - 2x = 0[/tex]

Factor x

[tex]x(x - 2) = 0[/tex]

[tex]x = 0 \: \: \: or \: \: \: x - 2 = 0[/tex]

[tex]x = 0 \: \: \: \: or \: \: \: \: x = 2[/tex]

These are the zeroes.

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

14 ) Go...

[tex]f(x) = {x}^{3} + 9x + 11x - 21[/tex]

[tex]0 = {x}^{3} + 9 {x}^{2} + 11x - 21[/tex]

[tex] {x}^{3} + 9 {x}^{2} + 11x - 21 = 0[/tex]

[tex](x - 1)(x + 3)(x + 7) = 0[/tex]

[tex]x - 1 = 0 \: \: or \: \: x + 3 = 0 \: \: or \: \: x + 7 = 0 \\ [/tex]

[tex]x = 1 \: \: \: or \: \: \: x = - 3 \: \: \: or \: \: \: x = - 7 \\ [/tex]

These are the zeroes.

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️