Graph each quadratic function using the steps from the picture.

Michael Dennis

Michael Dennis

Answered question

2021-12-05

Graph each quadratic function using the steps from the picture. Based on the graph determine t and range of the quadratic function.
F(x)=4x24x3

Answer & Explanation

juniorekze

juniorekze

Beginner2021-12-06Added 18 answers

Step1
To draw graph of the quadratic equation
F(x)=4x24x3
Step2
Compare given function with
f(x)=ax2+bx+c
a=4
b=4
c=3
1) Since a>0 graph is open upwards
Step3
2.) vertex=(b2a,F(b2a))
b2a=(4)2×4
b2a=0.5
F(0.5)=4(0.5)24(0.5)3
F(0.5)=4
vertex=(0.5,4)
axis of symmetry
x=b2a
x=0.5
Step 4
3.) y-intercept
F(0)=003
F(0)=3
y-intercept is (0, -3)
Step 5
4)
b2=4ac=(4)24(4)(3)
b24ac=16+48
b24ac=64
b24ac>0
Thus, F(x) has two x-intercept
F(x)=0
4x24x30
4x26x+2x3=0
2x(2x3)+1(2x3)=0
(2x+1)(2x3)=0
x=12,32
x=0.5,1.5
x-intercept are (-0.5,0) and (1.5,0)
image

<br/> Domain of the given function is <span class=" />(,)
Range of the given function is [4,)

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