Answer:
1.9y-1
2.4-x²+x
3.-3a²+2+a
4.-3x²+8+x
5.4-x²-2+x³-2x²+x
Step-by-step explanation:
1.(5y- 3) + (4y+2)
step1:5y-3+4y+2
step2:(5y+4y) + (-3+2)
answer:9y-1
2.(x³-3)+(-x²+x+3)
step1:x°-x²+x+3
step2:1-x²+x+3
step3:(1+3)-x²+x
answer:4-x²+x
3.(a²+12)–(4a²-a+10)
step1:a²+12-4a²+a-10
step2:(a²-4a²)+(12-10)+a
answer:-3a²+2+a
4.(2x²-1)+(-5x²+x+9)
step1:2x²–1-5x²+x+9
step2:(2x²–5x²)+(-1+9)+x
answer:-3x²+8+x
5.(x4-x2-2)+(x3-2x²+x+2)
step1:(x4-x2-2)+(x(³+²)–2x²+x)
answer:4-x²-2+x³-2x²+x
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