Asked by Allison Anderson
Multiply (2ã7-4ã2)(4ã7+8ã2)
Answers
Answered by
Steve
If the non-ascii characters mean
(2√7 - 4√2)(4√7 + 8√2)
then just multiply it out:
2√7*4√7 + 2√7*8√2 - 4√2*4√7 - 4√2*8√2
= 8*7 + 16√14 - 16√14 - 32*2
= 56 - 64
= -8
(2√7 - 4√2)(4√7 + 8√2)
then just multiply it out:
2√7*4√7 + 2√7*8√2 - 4√2*4√7 - 4√2*8√2
= 8*7 + 16√14 - 16√14 - 32*2
= 56 - 64
= -8
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