Asked by Nancy
SOLVE:
(3x-5)^3
that's to the third power
(3x-5)^3
that's to the third power
Answers
Answered by
Reiny
Solving implies that you are dealing with an equation.
You did not give an equation.
You did not give an equation.
Answered by
Nancy
sorry ...it is cubing binomials and the avove problem
Answered by
Reiny
What is it equal to??
You still did not state the "equation"
It should look something like
(3x-5)^3 = ????
are you just expanding (3x+5)^3
you could do it the long way by doing
(3x+5)(3x+5)(3x+5)
or you could use Pascal's triangle whose third row has coefficients 1 3 3 1
so
(3x+5)
= 1(3x)^3 + 3(3x^2)(5) + 3(3x)(5^2) + 5^3
= 27x^3 + 135x^2 + 225x + 125
You still did not state the "equation"
It should look something like
(3x-5)^3 = ????
are you just expanding (3x+5)^3
you could do it the long way by doing
(3x+5)(3x+5)(3x+5)
or you could use Pascal's triangle whose third row has coefficients 1 3 3 1
so
(3x+5)
= 1(3x)^3 + 3(3x^2)(5) + 3(3x)(5^2) + 5^3
= 27x^3 + 135x^2 + 225x + 125
Answered by
Nancy
great!!! thanks so much ...... you are a life saver!!!!! =)
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