Simplify 4^9 / [ 8x (16^4 - 2 x 8^4)]. ANS: 4/7
I do not understand the explanation but this is what I was doing:
- Made all the bases in terms of powers of 2 and got
2^18/ [2^3(2^16 - 2 x 2^12)] I multiplied the 2 and 2^13
2^18/ [2^3(2^16 - 2^13)] I distributed the 2^3
2^18/ [ 2^19 - 2^16] But now this is where I do not know what to do.
How can I solve these problems fast? I know they are not hard....I just get confused...
Thanks guys...
I do not understand the explanation but this is what I was doing:
- Made all the bases in terms of powers of 2 and got
2^18/ [2^3(2^16 - 2 x 2^12)] I multiplied the 2 and 2^13
2^18/ [2^3(2^16 - 2^13)] I distributed the 2^3
2^18/ [ 2^19 - 2^16] But now this is where I do not know what to do.
How can I solve these problems fast? I know they are not hard....I just get confused...
Thanks guys...