1) Let's find the zeros of this function f(x) =x²-10x +9
Since a=1, then which two numbers whose sum is equal to -10?
And their product is equal to 9?
S = -9 + -1 = -10
P = -9 x -1 = 9
2) So we can rewrite that equation as
f(x) = (x-9)(x-1)
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