Answer:
x=4
Step-by-step explanation:
hope it will help
First no.=x
2nd no.=2x
3rd no. =2x+6
x+2x+2x+6=26
5x+6=26
5×=26-6
5x =20.......divide both sides by 5
x=4
1st no.=x=4
Answer:
f(x)= - 4 (
) + 3
Step-by-step explanation:
1. start with f(x)=a(
+q
2. in that vertex is (p,q) noticing that use given vertex(0,3) and change the equation/function --> f(x)=a(x-0)+3 --> f(x)=a(
+3
3. Then use the give point and substitute to find "a" value --> - 1 = a(
+3
--> - 1 = a + 3 --> a= - 4
4. put the "a" value into the #2. function/equation --> f(x)= - 4(
+3
Answer:
vertex = (1, - 9 )
Step-by-step explanation:
The equation of a parabola in vertex form is
f(x) = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
Given
f(x) = x² - 2x - 8
To complete the square
add/ subtract ( half the coefficient of the x- term )² to x² - 2x
f(x) = x² + 2(- 1)x + 1 - 1 - 8
= (x - 1)² - 9 ← in vertex form
with vertex = (1, - 9 )