98 PTS!
Can someone please help?
2 answers:
Answer: -22
Step-by-step explanation:
In the first question, we can simplify 2√8 to 4√2, making it :
(√10 + 4√2)(√10 - 4√2)
When you FOIL, √10(√10) = 10, and 4√2 * -4√2 = -32. The others cancel each other out. So -32 + 10 = -22.
Answer:
1. -22
Step-by-step explanation:
1. There is a special property that we can use. It's a^2-b^2=(a+b)(a-b).
In this case, your a value is sqrt(10) and your b value is 2 sqrt(8).
Thus, (sqrt10 + 2sqrt(8))(sqrt10 - 2sqrt(8)) = sqrt10^2 - 2sqrt(8)^2 = 10 - 32 = -22.
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