Asked by Melissa
                If f(x) = (x-4) (x+3) , determine the x-intercept of each function
a)y=f(x) b) y=-2f(x) c) y=(-(x+1))
thanks for the help !!!!!!
            
        a)y=f(x) b) y=-2f(x) c) y=(-(x+1))
thanks for the help !!!!!!
Answers
                    Answered by
            MathMate
            
    (a)
The x-intercept would be the zeroes of the function, that is the values of x such that:
f(x) = (x-4) (x+3) = 0
For this to happen, (x-4)=0 or (x+3)=0 giving x=4 or x=-3.
(b)
Multiplying f(x) by -2 does not change the values of the zeroes.
(c)
Equate the function expression to zero and solve for x, i.e. the value of x which makes the function (expression) = 0.
    
The x-intercept would be the zeroes of the function, that is the values of x such that:
f(x) = (x-4) (x+3) = 0
For this to happen, (x-4)=0 or (x+3)=0 giving x=4 or x=-3.
(b)
Multiplying f(x) by -2 does not change the values of the zeroes.
(c)
Equate the function expression to zero and solve for x, i.e. the value of x which makes the function (expression) = 0.
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