Answer:
b = -9
Step-by-step explanation:
If we have a function with the form:
The axis of symmetry is equal to:
So, for the function , the value of a is 3 and the value of c is 4. It means that its axis of symmetry is equal to:
Solving for b, we get that:
Additionally, the axis of symmetry is , so replacing x by 3/2, we get that b is equal to:
Answer:
7(x+11)=9x-18
7x + 77 = 9x - 18
7x - 7x + 77 = 9x - 7x - 18
77 = 2x - 18
18 + 77 = 2x - 18 + 18
95 = 2x
95/2 = 2x/2
x = 47.5
Step-by-step explanation:
1. distribute the bracket
2. subtract 7 from both sides
3. add 18 to both sides
4. divide both sides by 2
Answer:
4m^2 - 20m +21
Step-by-step explanation:
(2m-3)(2m-7)
identity >>>> (x+a)(x+b) = x^2 + ( a+b)x + ab
given x= 2m
a= -3
b= -7
(2m)^2 +(-3+ -7)2m+ (-3×-7)
4m^2 +(-6m -14m) + 21
<u>4</u><u>m</u><u>^</u><u>2</u><u> </u><u>-</u><u>2</u><u>0</u><u>m</u><u> </u><u>+</u><u>2</u><u>1</u>
Answer:
X=9 or x=-9
Step-by-step explanation:
X^2=81
Can be written as
x^2-81=0
Factorize by the property:
a^2-b^2=(a-b)(a+b)
So the expression becomes:
(x-9)(x+9)=0
Therefore, either x-9=0or x+9=0
Then the solutions are x=9 or x=-9