What is the standard form of $y = 9 x^{2} (2 x + x^{3} - 3)$ $y=9x^2(2x+x^3-3)$ ?

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Answer 1 · 2016-04-24T15:33:16

$y = 9 x^{5} + 18 x^{3} - 27 x^{2}$ $y=9x^5+18x^3-27x^2$

Multiply everything inside the brackets by $9 x^{2}$ $9x^2$ giving

$y = 18 x^{3} + 9 x^{5} - 27 x^{2}$ $y=18x^3+9x^5-27x^2$

Rearranging

$y = 9 x^{5} + 18 x^{3} - 27 x^{2}$ $y=9x^5+18x^3-27x^2$

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Standard form $->a_nx^n+a_(n-1)x^(n-1)+a_(n-2)x^(n-2)+....a_1x^1+a_0x^0$

What is the standard form of y=9x^2(2x+x^3-3) y=9x2(2x+x3−3) y=9x^2(2x+x^3-3) ?