Math question functions?

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If f(x) = x^3 - (a + b)x^2 + abx, find the value of f(a) and explain the significance of x - a.

2007-09-24 14:06:30 · 2 answers · asked by Chess 2 in Science & Mathematics ➔ Mathematics

f(a) = a³ - (a+b)a² + aba
f(a) = a³ - a³ - a²b + a²b = 0

significance requires a context.

2007-09-24 14:11:43 · answer #1 · answered by Philo 7 · 0⤊ 0⤋

f(x)=x(x-a)(x-b)
f(a)=0
This curve crosses the x axis in three places, 0,a,b

2007-09-24 14:10:53 · answer #2 · answered by chasrmck 6 · 0⤊ 0⤋