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# Math help question. Please respond

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Guest Dec 4, 2014

#2
+5

$$x^4*x^5=x^9$$

$${{\mathtt{x}}}^{{\mathtt{4}}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{3}}} = {{\mathtt{x}}}^{{\mathtt{7}}}$$

$$x^4*15=15x^4$$

$$x*x^5=x^6$$

$$x*x^3=x^4$$

$$x*15=15x$$

$$5*x^5=5x^5$$

$$5*x^3=5x^3$$

$$5*15=75$$

simplify gives you $$x^9+x^7+x^6+5x^5+16x^4+5x^3+75$$

Guest Dec 4, 2014
#1
+87301
+5

The constant term is just the product of the two constant terms in each polynomial....thus 15 * 5 = 75

CPhill  Dec 4, 2014
#2
+5

$$x^4*x^5=x^9$$

$${{\mathtt{x}}}^{{\mathtt{4}}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{3}}} = {{\mathtt{x}}}^{{\mathtt{7}}}$$

$$x^4*15=15x^4$$

$$x*x^5=x^6$$

$$x*x^3=x^4$$

$$x*15=15x$$

$$5*x^5=5x^5$$

$$5*x^3=5x^3$$

$$5*15=75$$

simplify gives you $$x^9+x^7+x^6+5x^5+16x^4+5x^3+75$$

Guest Dec 4, 2014