упростите выражения1)(x-2)(x+3)+(x-3)(x+2)2)(1 – x + 4x2 – 8x3) + (2x3упростите выражения1)(x-2)(x+3)+(x-3)(x+2)2)(1 – x + 4x2 – 8x3) + (2x3упростите выражения
1)(x-2)(x+3)+(x-3)(x+2)
2)
(1 – x + 4x2 – 8x3) + (2x3 + x2 – 6x – 3) – (5x3 + 8x2)
3)
(0,5a – 0,6b + 5,5) – (–0,5a + 0,4b) + (1,3b – 4,5)
4)
(–2x2 + x + 1) – (x2 – x + 7) – (4x2 + 2x + 8)
5)
(3a2 – a + 2) + (– 3a2 + 3a – 1) – (a2 – 1)
6)
2a–3b+c–(4a+7b+c + 3)
7)
2xy – y2 + (y2 – xy) – (x2 + xy)
8)(y-1)(y+2)+(y+1)(y-2)
9)(a+1)(a+2)+(a+3)(a+4)
10)(c-1)(c-2)+(c-3)(c-4)
1)(x-2)(x+3)+(x-3)(x+2)
2)
(1 – x + 4x2 – 8x3) + (2x3 + x2 – 6x – 3) – (5x3 + 8x2)
3)
(0,5a – 0,6b + 5,5) – (–0,5a + 0,4b) + (1,3b – 4,5)
4)
(–2x2 + x + 1) – (x2 – x + 7) – (4x2 + 2x + 8)
5)
(3a2 – a + 2) + (– 3a2 + 3a – 1) – (a2 – 1)
6)
2a–3b+c–(4a+7b+c + 3)
7)
2xy – y2 + (y2 – xy) – (x2 + xy)
8)(y-1)(y+2)+(y+1)(y-2)
9)(a+1)(a+2)+(a+3)(a+4)
10)(c-1)(c-2)+(c-3)(c-4)
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Answers & Comments
2)1-x+4x^2-8x^3+2x^3+x^2-6x-3-5x^3-8x^2=-11x^3-3x^2-7x-2
3)0,5a-0,6b+5,5+0,5a-0,4b+1,3b-4,5=a+0,3b+1
4)-2x^2+x+1-x^2+x-7-4x^2-2x-8=-7x^2-14
5)3a^2-a+2-3a^2+3a-1-a^2+1=-a^2+2a+2
6)2a-3b+c-4a-7b-c-3=-2a-10b-3
7)2xy-y^2+y^2-xy-x^2-xy=-x^2
8)y^2+2y-y-2+y^2-2y+y-2=2y^2-4
9)a^2+2a+a+2+a^2+4a+3a+12=2a^2+10a+14
10)c^2-2c-c+2+c^2-4c-3c+12=2c^2-10c+14