What are the x-intercepts of f(x)= -16x^2+60x+16 ??!

Question

scoobydo · Answer

X=1

anonymous · Answer

How'd you get that ?

anonymous · Answer

@scoobydo

scoobydo · Answer

without the total u could have X whatever you want (is there choices)

anonymous · Answer

No.  It gives me the expression and says .b" what are the x-intercepts of the graph f(x)? show your work ".

anonymous · Answer

I'm just trying to learn, and get a good grade.

scoobydo · Answer

1*1=1
16*1=16
60*1=60
so that means, 1+16+60+16=93

welshfella · Answer

first simplify it a bit by divding through by -4
= -4(4x^2 - 15x - 16)

now we need to solve  4x^2 - 15x - 16 = 0


this will factor

welshfella · Answer

**   sorry  that should be 
4x^2 - 15x - 4  =  0

welshfella · Answer

4x^2 - 16x + x  - 4 = 0

can you continue from here?

welshfella · Answer

Oh - I'm talking to myself!!

scoobydo · Answer

no can u help me please

johnweldon1993 · Answer

Lol but it was so informative for yourself Welsh!

welshfella · Answer

yea lol

welshfella · Answer

factor   in groups of 2 
4x(x - 4) + 1(x - 4) = 0

x - 4 is common  so
(4x + 1(x - 4) = 0

welshfella · Answer

now  4x + 1 = 0  or x - 4 = 0

now its easy to find the solution set

scoobydo · Answer

@welshfella  please help me in earth science

welshfella · Answer

i doubt i can Dont know much about that.