Answer:
Multiply by 100
2m=200 cm
Step-by-step explanation:
Answer:
First finish the brackets
21+9=30
30=30
So, it’s true
Step-by-step explanation:
Answer:
3(x - 2)² - 17
Step-by-step explanation:
The equation of a quadratic in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
Using the method of completing the square.
Given
3x² - 12x - 5 ← factor out 3 from the first 2 terms
= 3(x² - 4x) - 5
To complete the square
add/subtract ( half the coefficient of the x- term)² to x² - 4x
= 3(x² + 2(- 2)x + 4 - 4 ) - 5
= 3(x - 2)² - 12 - 5
= 3(x - 2)² - 17 ← in vertex form
To solve this, change both into common denominators. Change the 4 into an 8 and multiply 1 by 2 (8 ÷ 4 = 2). Now, you have 7/8 - 2/8. Subtract to get 5/8. Since it is already in simplest form, there is no need to simplify it.