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which point is an x-intercept of the quadratic function (x+5)(x-9)=f(x)

Sagot :

Step-by-step explanation:

if I understand you correctly :

f(x) = y = (x + 5)(x - 9)

an x-intercept is a point where y = 0.

this can happen for f(x) only when

x = -5 (then the first bracket turns 0, turning all y to 0)

and

x = 9 (then the second bracket turns 0, turning all y to 0)

so, we have 2 x-intercepts (as it should be for a quadratic function) :

(-5, 0)

(9, 0)