catpalmer14813 catpalmer14813

05-11-2017
Mathematics

contestada

(3x^3 - 7x^2 + 12) - (3x^3 + 6x^2 + 10x)
A) -x^2 + 10x + 12
B) -13x^2 - 10x + 12
C) -6x^3 + x^2 - 10x - 12
D) -9x^6 - 42x^4 - 10x + 12

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tynollette tynollette

05-11-2017

the answer should be B. you combine the like terms. when it is a negative sign in front of the parenthesis, when removing the parenthesis, every term inside the parenthesis need to change sign, negative to positive, positive to negative.

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