Find the X and Y Intercepts y=x^2-6x+8

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Algebra

$y = x^{2} - 6 x + 8$

Find the x-intercepts.

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To find the x-intercept(s), substitute in $0$ for $y$ and solve for $x$ .

$0 = x^{2} - 6 x + 8$

Solve the equation.

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Rewrite the equation as $x^{2} - 6 x + 8 = 0$ .

$x^{2} - 6 x + 8 = 0$

Factor $x^{2} - 6 x + 8$ using the AC method.

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Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $8$ and whose sum is $- 6$ .

$- 4, - 2$

Write the factored form using these integers.

$(x - 4) (x - 2) = 0$

Set $x - 4$ equal to $0$ and solve for $x$ .

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Set the factor equal to $0$ .

$x - 4 = 0$

Add $4$ to both sides of the equation.

$x = 4$

Set $x - 2$ equal to $0$ and solve for $x$ .

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Set the factor equal to $0$ .

$x - 2 = 0$

Add $2$ to both sides of the equation.

$x = 2$

The solution is the result of $x - 4 = 0$ and $x - 2 = 0$ .

$x = 4, 2$

x-intercept(s) in point form.

x-intercept(s): $(4, 0), (2, 0)$

Find the y-intercepts.

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To find the y-intercept(s), substitute in $0$ for $x$ and solve for $y$ .

$y = {(0)}^{2} - 6 \cdot 0 + 8$

Solve the equation.

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Remove parentheses.

$y = {(0)}^{2} - 6 \cdot 0 + 8$

Simplify ${(0)}^{2} - 6 \cdot 0 + 8$ .

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Simplify each term.

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Raising $0$ to any positive power yields $0$ .

$y = 0 - 6 \cdot 0 + 8$

Multiply $- 6$ by $0$ .

$y = 0 + 0 + 8$

Simplify by adding zeros.

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Add $0$ and $0$ .

$y = 0 + 8$

Add $0$ and $8$ .

$y = 8$

y-intercept(s) in point form.

y-intercept(s): $(0, 8)$

List the intersections.

x-intercept(s): $(4, 0), (2, 0)$

y-intercept(s): $(0, 8)$

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