Expand
15x^{4}-90x^{3}+375x^{2}-720x+960
Evaluate
15\left(x^{2}-3x+8\right)^{2}
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15\left(x^{4}-6x^{3}+25x^{2}-48x+64\right)
Square x^{2}-3x+8.
15x^{4}-90x^{3}+375x^{2}-720x+960
Use the distributive property to multiply 15 by x^{4}-6x^{3}+25x^{2}-48x+64.
15\left(x^{4}-6x^{3}+25x^{2}-48x+64\right)
Square x^{2}-3x+8.
15x^{4}-90x^{3}+375x^{2}-720x+960
Use the distributive property to multiply 15 by x^{4}-6x^{3}+25x^{2}-48x+64.
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