What is x3 + 15x2 -- 9x + 12 less than -15x2 - 7x?​

Sagot :

Answer:

x^2+30x^2+16x+12

Step-by-step explanation:

x^3+15x^2-9x+12-(-15x^2-7x)

=x^3+15x^2-9x+12+15x^2+7x)

=x^2+30x^2+16x+12

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