anonymous
  • anonymous
(x+3) (x+3)^3 simplify
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
(a+b)^3 = a^3 + b^3 + 3ab(a+b)
anonymous
  • anonymous
see there are two ways...... either expand the cube and multiply/.... or use binomial expansion (x+3)^4.
mathslover
  • mathslover
\[\large{(x+3)(x+3)^3}\] \[\large{(a+b)^3=a^3+b^3+3ab(a+b)->identity}\]

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mathslover
  • mathslover
@cdelomas have u learnt binomial theorem?
anonymous
  • anonymous
no
anonymous
  • anonymous
binomial theorem or pascals triangle will work
anonymous
  • anonymous
what is that
anonymous
  • anonymous
http://www.mathsisfun.com/pascals-triangle.html
anonymous
  • anonymous
i will check it out and comeback
mathslover
  • mathslover
forget binomial theorem : \[\large{(x+3)(x+3)^3=(x+3){(x+3)(x+3)(x+3)}}\] \[\large{(x+3)^2(x+3)^2}\] \[\large{(x+3)^2=x^2+3^2+2(x)(3)}\] \[\large{x^2+9+6x}\] \[\large{(x^2+9+6x)(x^2+9+6x)}\] \[\large{x^4+9x^2+6x^3+9x^2+81+54x+6x^3+54x+36x^2}\] \[\large{x^4+12x^3+54x^2+108x+81}\]
mathslover
  • mathslover
got it ?

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