Answer:
18 or 42??
Step-by-step explanation:
honestly I just googled it...
18
we start to write a few iterations of 6 and 9:
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, ...
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, ...
the LCD is the least repeating number in both sequences. It is 18
There are several ways in which we could answer this question. My choice is to actually solve the given quadratic equation, x^2 + 4x + 4 = 12.
Note that x^2 + 4x + 4 is a perfect square. Thus,
x^2 + 4x + 4 = 12 is the same as (x+2)^2 = 12, so that
x+2 = plus or minus √3*√4, or plus or minus 2√3.
Thus, the two real, unequal roots are
x = -2 + 2√3 and x = -2 - 2√3. These correspond to answer choices C and E.
25
you count by 5, 5 times
1. 5 +
2. 5 +
3. 5 +
4. 5 +
5. 5 +
= 25
