Answer:
x = 3 ± i 
Step-by-step explanation:
Given
x² - 6x + 12 = 0 ( subtract 12 from both sides )
x² - 6x = - 12
Using the method of completing the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(- 3)x + 9 = - 12 + 9
(x - 3)² = - 3 ( take the square root of both sides )
x - 3 = ±
= ± i
( add 3 to both sides )
x = 3 ± i 
2x+10y I thinks that’s the answer mb
Answer:
Their mass at the start was 400 kg.
Step-by-step explanation:
Given:
The tyres on a car during a grand prix race are reduced in mass by 3%. Their mass is 388 kg at the end of the race.
Now, to find the mass at the start.
<u>Let the mass at the start be
.</u>
According to question:

⇒
⇒
⇒
<em>Dividing both sides by 0.97 we get:</em>
⇒
Therefore, their mass at the start was 400 kg.
Answer:
y= -2x-4
Step-by-step explanation:

Substitute values into point slope form


Answer:
-x² - 4x + 6
Step-by-step explanation:
(-2x² - 3x + 4) - (-x² + x - 2) =
= -2x² - 3x + 4 + x² - x + 2
= -x² - 4x + 6