Question

How do you simplify `\frac { 20- 4^ { 2} } { ( 1+ 1) \cdot 2}`?

Answer 1

1

Explanation:

Start by multiplying out in the denominator:

`(20 - 4^2)/((1+1)*2) = (20 - 4^2)/(2*2) = (20-4^2)/4`

...then note that you can factor out 4 the numerator:

`=(4(5-4))/4`

`=(5-4)`
`=1`