M a sh q l a r

Ko‘paytuvchilarga ajrating (355–360):

355. 1) a+b+c(a+b); 2) m–n+p(m–n);

3) x+3a(x+y)+y; 4) x+2a(x–y)–y.

356. 1) (x+y)+ (x+y)²; 2) (a–b)² + a–b;

3) 2m(m–n) +(m–n); 4) 4q(p–1)+(p–1)².

357. 1) 2m(m–n)+m–n; 2) 4q(p–1)+p–1;

3) 2m(m–n)–n+m; 4) 4q(p–1)+1–p.

358. 1) a(x–c)+bc–bx; 2) a(b+c)+db+dc ;

3) 3a(2b+c)+8b+4c; 4) 2x(3x–4y)–6x+8y.

359. 1) ab+bc–2ad–2bd; 3) 2bx–3ay–6by+ax;

2) ac–3bd+ad–3bc; 4) 5ay–3bx+ax–15by.

360. 1) xy²–by²–ax+ab+y²–a; 2) ax²–ay–bx²+cy+by–cx².

361. Hisoblang:

1) 139·15+18·139+15·261+18·261;

2) 125·48–31·82–31·43+125·83;

3) 14,7·13–2·14,7+13·5,3–2·5,3;

4) 3·4+4,2·+3·2+2,8·.

362. Ifodaning son qiymatini toping:.

1) 5a²–5ax–7a+7x, bunda x= –3, a=4;

2) m²–mn–3m+3n, bunda m= –0,5, n=0,25;

3) a²+ab–5a–5b, bunda a= 6,6, b=0,4;

4) a²–ab–2a+2b, bunda a=, b=0,15;

363. Hisoblang:

1) 287²–287·48+239·713; 2) 73,4²+73,4·17,2–90,6·63,4.

364. Tenglamani yeching:

1) x(x–4)+x–4=0; 2) t(t+7)–4t–28=0.