I believe it is option 2, sorry if incorrect
Answer:
D. 9 + 4√5
Step-by-step explanation:
What we're essentially doing here is squaring 2 + √5. (2 + √5 and 2 + 1√5 are essentially the same)
(2 + √5)(2 + √5) <em>(I didn't put the one on the conjugate for a reason; look above)</em>
<em>Step 1: Apply the distributive property by multiplying each term of 2 + √5 by 2 + √5</em>
4 + 2√5 + 2√5 + (√5)²
<em>Step 2: Combine 2√5 and 2√5 to get 4√5.</em>
4 + 4√5 + (√5)²
<em>Step 3: The square of √5 is 5.</em>
4 + 4√5 + 5
<em>Step 4: Add 4 and 5 to get 9.</em>
9 + 4√5 is the final answer to this question.
Answer: -1410
Step-by-step explanation:
Let's start by subbing in -4 for x
Now we can solve
Z would be 3 because 10*3 is 30 and 30-2 would be 28 :)
Answer:
A) 3:2
Step-by-step explanation:
45:30
<em>divide b</em>y 5
9:6
<em>divide by 3</em>
3:2