Find the zeros of the following

Question

asked Nov 19, 2021 145k views

1 Answer

Bonlenfum · Answer 1 · 2021-11-25T22:13:23+0000

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13 ) Go...

$f(x) = {x}^(2) - 2x$

$0 = {x}^(2) - 2x$

${x}^(2) - 2x = 0$

Factor x

x(x - 2) = 0

$x = 0 \: \: \: or \: \: \: x - 2 = 0$

$x = 0 \: \: \: \: or \: \: \: \: x = 2$

These are the zeroes.

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14 ) Go...

$f(x) = {x}^(3) + 9x + 11x - 21$

$0 = {x}^(3) + 9 {x}^(2) + 11x - 21$

${x}^(3) + 9 {x}^(2) + 11x - 21 = 0$

(x - 1)(x + 3)(x + 7) = 0

$x - 1 = 0 \: \: or \: \: x + 3 = 0 \: \: or \: \: x + 7 = 0 \\$

$x = 1 \: \: \: or \: \: \: x = - 3 \: \: \: or \: \: \: x = - 7 \\$

These are the zeroes.

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