To solve this equation , we need to write it in quadratic form
To get the equation in quadratic form we replace x^2 with u
can be written as
, Replace u for x^2
So equation becomes
Now we factor the left hand side
-16 and -1 are the two factors whose product is +16 and sum is -17
(u-16) (u-1) = 0
u -16 = 0 so u=16
u-1 =0 so u=1
WE assume u = x^2, Now we replace u with x^2
Now take square root on both sides , x= +4 and x=-4
Now take square root on both sides , x= +1 and x=-1
So zeros of the function are -4, -1, 1, 4
Answer:
The mid point of ST is (1,5) and ST = 10 units
Step-by-step explanation:
It is given that,
S(-3,2) and T(5,8). We need to find the coordinates of the midpoint of ST and also ST.
Let (x,y) be the mid point of ST. Using mid-point formula we get :
We have, x₁ = -3, x₂ = 5, y₁ = 2 and y₂ = 8
So,
(1,5) is the midpoint of ST.
Using distance formula to find ST as follows :
Hence, the mid point of ST is (1,5) and ST = 10 units.
Answer:
Step-by-step explanation:
=> 
Dividing both sides by -4
=> 
=> 
Answer:
70 students
Step-by-step explanation:
If 40% of all students in Mrs. Well's class got an A, and 28 students got an A, that means that 28 = 40%
To find the total number of students, we need to find 100%
40% = 28
Divide by 4
10% = 7
Multiply by 10
100% = 70
So there are 70 students in Mrs. Well's class.
Hope this helps you! :D
