Answer:

1.) x³+x²+2x-8

1.) x³+x²+2x-82.) x³-3x²+2x

Step-by-step explanation:

Sol'n;

1.) (2x³+x²-3) - (x³-2x+5)

Rule of Subtraction: change the sign of subtrahend and proceed to addition.

= 2x³+x²-3 - x³+2x-5

Combine like terms.

= x³+x²+2x-8

2.) (6x²+2x+1 + x³-6) - (9x²-5)

= (x³+6x²+2x-5) - (9x²-5)

Subtract.

= x³+6x²+2x-5 - 9x²+5

Solve.

= x³-3x²+2x

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