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For the graph of the parabola y=(x+2)(x−9) find the value of: the positive x-intercept.

User Mibou
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1 Answer

4 votes

Answer:

the positive x- intercept is x = + 9

Explanation:

the x- intercept is the point/s on the x- axis where the graph crosses it.

the y- coordinate of any point on the x- axis is 0

let y = 0 in the equation and solve for x , that is

y = (x + 2)(x - 9) ← substitute y = 0

(x + 2)(x - 9) = 0

equate each factor to zero and solve for x

x + 2 = 0 ( subtract 2 from both sides )

x = - 2

x - 9 = 0 ( add 9 to both sides )

x = 9

there are 2 x- intercepts at x = - 2 and x = 9

the value of the positive x- intercept is x = + 9

User Kabangi Julius
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