Which is a zero of the quadratic function f(x) = 9x2 – 54x – 19
Answers
Answered by
1
9x2-57x+3x-19
3x(3x-19)+1(3x-19)
(3x-19)(3x+1)
either 3x-19=0
x= 19/3
or
3x+1=0
x= -1/3
3x(3x-19)+1(3x-19)
(3x-19)(3x+1)
either 3x-19=0
x= 19/3
or
3x+1=0
x= -1/3
Answered by
5
f(x) = 9x² – 54x – 19
f(x) = (3x - 19) (3x + 1)
When f(x) = 0
(3x - 19) (3x + 1) = 0
3x - 19 = 0 or 3x + 1 = 0
x = 19/3 or x = -1/3
Answer: x = 19/3 or x = -1/3
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