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OpenStudy (anonymous):
Can someone please help me answer the questions: Find the exact value: (2- √2)² - (2+√2)² = ?
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OpenStudy (anonymous):
a^2-b^2 = (a+b)(a-b) (2- √2)² - (2+√2)² =(2-(sqrt2)+2+(sqrt2))(2-(sqrt2)-2-(sqrt2)) =(4)(-2sqrt2) =-8sqrt2
OpenStudy (anonymous):
great :) thanks for replay!
OpenStudy (anonymous):
you are welcome
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