(2x^3-3x^2-8)-(-5x^3-2x^3+7)+(x^2-3)
please answer fast its argent
Answers
Answer:
sorry I don't know.................
Answer:
9x^3-2x^2-18
Step-by-step explanation:
(2x^3-3x^2-8)-(-5x^3-2x^3+7)+(x^2-3)
Remove unnecessary parentheses
2x^3-3x^2-8-(-5x^3-2x^3+7)+(x^2-3)
(2x^3-3x^2-8)-(-5x^3-2x^3+7)+(x^2-3)
collect like terms
(2x^3-3x^2-8)-(-7x^3+7)+(x^2-3)
(2x^3-3x^2-8)-(-5x^3-2x^3+7)+(x^2-3)
when there is a "+" in front of an expression in parentheses, the expression remains the same
(2x^3-3x^2-8)-(-7x^3+7)+x^2-3
2x^3-3x^2-8-(-7x^3+7)+x^2-3
when there is a "-" in front of an expression in parentheses, change the sign of each term of the expression
2x^3-3x^2-8+7x^3-7+x^2-3
2x^3-3x^2-8+7x^3-7+x^2-3
collect like terms
9x^3-3x^2-8-7+x^2-3
2x^3-3x^2-8+7x^3-7+x^2-3
collect like terms
9x^3-2x^2-8-7+x^2-3
2x^3-3x^2-8+7x^3-7+x^2-3
calculate the sum of the negative numbers
9x^3-2x^2-18
solution
9x^3-2x^2-18