f(x) = ax^2 - 4x + b
If x = -2 , 3 are solutions of zeros function f(x) then b = ?
If x = -2 then a(-2)^2 - 4(-2) + b = 0
4a + 8 + b = 0 (1st)
If x = 3. then a(3)^2 - 4(3) + b = 0
9a - 12 + b = 0 (2nd)
Subtract (2nd) and (1st)
4a + 8 + b = 0 (1st)
9a - 12 + b = 0 (2nd)
--------------------------
-5a + 20 = 0
-5a = -20
a = 4
Substitute a = 4 into 4a + 8 + b = 0 (1st)
4(4) + 8 + b = 0
16 + 8 = -b
b = -24
Answer is A) -24
Double check:
a = 4 and b = -24 so
f(x) = 4x^2 - 4x - 24
zero function:
4x^2 - 4x - 24 = 0
4(x^2 - x - 6) = 0
4(x - 3)(x + 2) = 0
x - 3= 0; x = 3
x = -2 = 0; x = -2
x = -2 , 3 are solutions of the function.
Find the mean, median, and interquartile for the date set below<br>
17,23,8,5,9,16,22,11,13,15,17,18
Ray Of Light [21]
Step-by-step explanation:
couldn't do interquartile but I hope this helps
Need a common denominator.
Use 36.
Multiply the denominators by each other.
45/36 + 28/38 add the top!
73/36 or 2 and 1/36
C.
Answer:
answer is D
Step-by-step explanation:
If AB and AC are the same that means that <B and <C are the same and since all sides must add up to 180 degrees then you add angles C and B together and subtract by 180.
180-80=100
Answer:
C) g(x)=(x-5)^2+5
Step-by-step explanation: