Объяснение:
1) (1/2•(a) + 1/3•(b)) - (5/2•(a) - 2/3•(b)) +(a+b) = 1/2•(a) + 1/3•(b) - 5/2•(a) + 2/3•(b) + a+b= -2a+b+a+b= 2b-a
2) (0,3a - 1,2b)+(a-b) - (1,3a - 0,2b) = 0,3a - 1,2b + a - b - 1,3a+0,2b= -a +a -b-b= -2b
3) (11p³ - 2p²)-(p³-p²)+(-5p²-3p³) = 11p³- 2p² - p³+p²-5p²-3p³=7p³-6p²
4) (5x²+6x³)+(x³-x²)-(-2x³+4x²)= 5x²+6x³+x³-x²+2x³-4x²= 9x³
Объяснение:
1) (1/2•(a) + 1/3•(b)) - (5/2•(a) - 2/3•(b)) +(a+b) = 1/2•(a) + 1/3•(b) - 5/2•(a) + 2/3•(b) + a+b= -2a+b+a+b= 2b-a
2) (0,3a - 1,2b)+(a-b) - (1,3a - 0,2b) = 0,3a - 1,2b + a - b - 1,3a+0,2b= -a +a -b-b= -2b
3) (11p³ - 2p²)-(p³-p²)+(-5p²-3p³) = 11p³- 2p² - p³+p²-5p²-3p³=7p³-6p²
4) (5x²+6x³)+(x³-x²)-(-2x³+4x²)= 5x²+6x³+x³-x²+2x³-4x²= 9x³