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secondary 3 | E Maths
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How to expand from step #1 to step #2 ? Thanks!
Date Posted: 5 years ago
Views: 264
rem: a² - b² = (a-b)(a+b) ?
numerator:
[√(x+2) - √2][√(x+2) + √2]
= [√(x+2)]² - (√2)²
= x+2 - 2
hope this helps.
numerator:
[√(x+2) - √2][√(x+2) + √2]
= [√(x+2)]² - (√2)²
= x+2 - 2
hope this helps.
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