Answer:
1. 5²-3(5)+5
25-15+5
10+5
=15
2. 2(-2)³-8
2(8)-8
16-8
=8
3. 2³-2
8-2
=6
4. (x+8)+(x-3)
2x-3x+8x-11
=7x-11
5. (x+3)(x-2)
x²-2x+3x-6
=x²+x-6
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Answers & Comments
Answer:
1. 5²-3(5)+5
25-15+5
10+5
=15
2. 2(-2)³-8
2(8)-8
16-8
=8
3. 2³-2
8-2
=6
4. (x+8)+(x-3)
2x-3x+8x-11
=7x-11
5. (x+3)(x-2)
x²-2x+3x-6
=x²+x-6