M a sh q l a r

247. Ko‘phadlarni tashkil qiluvchi birhadlarni ayting:

1) –2x²+3x–1; 3) 7a²–b–c;.

2) 4x²–3x+6; 4) –3a+0,5x–2x².

248. Ko‘phadlarni birhadlarning yig‘indisi shaklida yozing:

1) 7a⁴–9a³–2a+11; 3) 1,6a³b–4a²b²+13ab³–b⁴;

2) –6x⁵+3x⁴–12x²+5; 4) 2,5x⁴–18x³y–16x³y–3xy².

249. Birhadlardan ko‘phad tuzing:

1) 6x², 7x va 9; 4) a⁵, –a⁴ va a;

2) 2x², –11x va 3; 5) 8a³, 4a²b, –2ab² va b³;

3) –x⁴, x³ va –x; 6) 4a³b, –2a²b² va –5ab³.

250. Ko‘phadni uning har bir hadini standart shaklga keltirib, soddalashtiring:

1) 12a² 3ba–2ab3ab²+11aba; 3) 1,5xy²(–4)xyz–4mnk5m²nk;

2) 2ab² 4ab–3a²8aba–2abab²; 4) 4cc²c(–)bc+5xy² xy².

251. Ifodani uning har bir qo’shiluvchisini standart shaklga keltirib, soddalashtiring:

1) 3aaa(–1ab)+4xxx·3xy;

2) 1,5yyy(–4xyz)–4mnk·5m²nk²;

3) (2ab)(a²b²)–(3a²b)(b);

4) (3a)(ab²)–(4b²)(a²b).

252. Ko‘phadning son qiymatini toping:

1) 2a³+3ab+b², bunda a=0,5, b=;

2) 2a⁴–ab+2b², bunda a= –1, b= –0,5;

3) x²–2xy+y², bunda x=y= –4,2;

4) x²+2xy+y², bunda x=1,2, y= –1,2.

253. Ko‘phadni soddalashtiring va uning son qiymatini toping:

1) –aba+a²b2ab+4, bunda a=2, b=;

2) b²5ab–5a5a²b, bunda a=, b= –2;

3) x²yxy–xy²xy+xy, bunda x= –3, y=2;

4) xy²x²y–xyxy, bunda x= –2, y=3.