F(x)=2x^2-10
f(5)=2(5^2)-10
f(5)=2(25)-10
f(5)=50-10
f(5)=40
Answer:
y = - 2(x - 1)² + 18
Step-by-step explanation:
- 2x² + 4x + 16 ← factor out - 2 from the first 2 terms
= - 2(x² - 2x) + 16
using the method of completing the square
add/subtract ( half the coefficient of the x- term)² to x² - 2x
= - 2(x² + 2(- 1)x + 1 - 1) + 16
= - 2(x - 1)² + 2 + 16
= - 2(x - 1)² + 18 ← in vertex form
Answer:
21 m
Step-by-step explanation:
Answer:
40+39=79
Step-by-step explanation:
10 times 4+30+9
40*39=79
