3 years ago

Step-by-step solution for: (√2+√10)^2

1 answer:

azamat3 years ago

5 0

Note: √a * √a = a
   √a * √b = √ab

(√2 + √10)² = (√2 + √10)(√2 + √10)
= √2(√2 + √10) + √10(√2 + √10)
= √2*√2 + √2*√10 + √10*√2 + √10*√10
=    2 + √20 + √20 + 10
      = (2 + 10) + (√20 + √20)
      = 12 + 2√20

√20 = √(4 *5) = √4 * √5 = 2√5

   = 12 + 2√20 = 12 + 2(2√5)
   = 12 + 4√5

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What is 287.9412 rounded to the nearest tenth?

Westkost [7]

Hello!

If we want to round 287.9412 to the nearest tenth, the answer would be 287.9

Since rounding to the nearest tenth would mean rounding the first decimal, that's why it gives us that answer.

Also:

287.9412

2 = hundreds

8 = tens

7 = ones

. = decimal