Question

ХЕЛП МИ ПЛИЗ
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Answer 1

1) 6х²-7х+4-4х²+4х-18 = 2х²-3х-14

2) 3х+9-х²-15х-40 = -х²-12х-31

3) 10а²-6а+5+11а-а³-6 = -а³+10а²+5а-1

Answer 2

1)

(6x²-7x+4)-(4x²-4x+18)=6x²-7x+4-4x²+4x-18= 6x²-4x²-7x+4x+4-18= 2x²-3x-14

2)

(3x+9)+(-x²-15x-40)=3x+9-x²-15x-40=-x²-12x-31

3)

(10a²-6a+5)-(-11a+a³+6)=10a²-6a+5+11a-a³-6=

-a³+10a²+5a-1