Simplify and expand (X+3)(x-3)(3x+3)
2 answers:
Answer:
3x^3 + 3x^2 - 27x - 27
Step-by-step explanation:
<h3>
Answer: 3x^3 + 3x^2 - 27x - 27</h3>
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Work Shown:
(x+3)(x-3)(3x+3)
(x^2-9)(3x+3) .... difference of squares rule
y(3x+3) .... let y = x^2-9
y*3x + y*3 .... distribute
3x( y ) + 3( y )
3x( x^2 - 9 ) + 3(x^2 - 9) .... plug in y = x^2-9
3x*x^2 + 3x*(-9) + 3*x^2 + 3*(-9) .... distribute
3x^3 - 27x + 3x^2 - 27
3x^3 + 3x^2 - 27x - 27
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