Step-by-step explanation:
1. a² - ( b ² - 2bc + c² ) = a ² - b ² + 2bc - c²
2. 8p² - 18 q²
3. 3ab² - c²d + 3ab - b²c²
4. x² - 2x + 1
Answer:
80%
Step-by-step explanation:
1 in 5 breaks
1/5 is 20%
100%-20%=80%
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Answer:
just google it dude
Step-by-step explanation:
google :)