Maths

Powers

Square roots

Basic algebra

Multiplying out brackets

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  • Created by: beth
  • Created on: 16-02-13 13:14

Powers (indices)

6x6x6x6x6 = 6 to the power of 5

So 6 to the power of 5 means 6 multiplied by itself 5 times.

2 to the power of 7 = 2x2x2x2x2x2x2 = 128

7 to the power of 2 (7 squared) = 7x7=49

3 to the power of 1 = 3 because anything to the power of 1 is just itself

Also 1 to the power of any number is always just 1 ( 1x1x1x1=1)

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Square roots

Square root of 49=

What number times by itself gives 49?

7 because 7x7 = 49

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Algebra

Simplifying

3a-2+4a+5=

+3a+4a-2+3

  7a + 3

Like terms have exactly the same letters e.g a-terms or b-terms or no letters at all if they are number only terms.

Combine like terms using the number line.

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Multiplying out brackets

The thing outside the brackets multiplies each separate term inside the brackets When letters are multiplied together they are just written next to each other ( pxq= pq) 5(2a+3)= 10a+15 3(4y+b-2)= 12y+3b-6 2t(5r-6w) = 10r-12w P(1+4q-2r) =p+4pq-2rp

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