non calc maths gcse mock 3

Topic list: LAST 3.

Construction💔💔💔

Surds💔💔💔💔

• Surds cannot be added. √a+√b≠√(a+b)
  
• Surds cannot be subtracted. √a−√b≠√(a−b)
  
• Surds can be multiplied. √a×√b=√(a×b)
  
• Surds can be divided. √a√b=√ab.
  
• Surds can be written in exponential form. √a=a12n√a=a1n.
  

√150 is 5√6 

√150=√25 x √6

√25 is 5, so we drop the surd. √6 is irrational, so it becomes 5√6

Transformations - enlargements💔💔💔

• we need the scale factor and the centre of enlargement 
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IM FREEEEE