7 КЛАСС!АЛГЕБРА!!СРОЧНО!!ЗАРАНЕЕ СПАСИБО!(можно не все). Created by Didigrinevich1. algebra-ru

7 КЛАСС!АЛГЕБРА!!СРОЧНО!!ЗАРАНЕЕ СПАСИБО!(можно не все)...

July 2022 1 2 Report

7 КЛАСС!АЛГЕБРА!!СРОЧНО!!ЗАРАНЕЕ СПАСИБО!(можно не все)

Answers & Comments

m11m 1) b+4 - 3   =b+4-3b = 4-2b = -2(b-2) = -2
b(b-2) b-2 b(b-2) b(b-2) b(b-2) b

2) 1 - x+2   = 1 -    x+2 = 3x-x-2 = 2x-2   = 2(x-1) = 2
x-1 3x²-3x x-1 3x(x-1) 3x(x-1) 3x(x-1) 3x(x-1) 3x

3)    a²   - a =     a² - a = a²-a(a+7) = a²-a²-7a = -7a
a²-49 a-7 (a-7)(a+7) a-7 (a-7)(a+7) (a-7)(a+7) a²-49

4) x+1 +   x = x+1 - x =(x+1)(1+x)-x*x =x²+2x+1-x² = 2x+1 =
x-x² x²-1 x(1-x) (1-x)(1+x) x(1-x)(1+x) x(1-x)(1+x) x(1-x²)
= 2x+1
   x-x³

5) 2x² - 2x=2x²-2x(x-1) =2x²-2x²+2x= 2x
  x-1 x-1 x-1 x-1

6) 1 - 1 + 4x   =    1 -    1 + 4x =2x+y-2x+y+4x =
2x-y 2x+y 4x²-y² 2x-y 2x+y (2x-y)(2x+y) (2x-y)(2x+y)

=4x+2y
4x²-y²

7) a²+b² + b + b =   a²+b² + b -   b = a²+b²+b(a-b)-b(a+b) =
a²-b² a+b b-a (a-b)(a+b) a+b a-b (a+b)(a-b)

=a²+b²+ab-b²-ab-b²=a²-b² = 1
(a+b)(a-b) a²-b²

8)   3y+18 + 15y+57 - 2 = 3(y+6) + 15y+57 - 2 =
y²+12y+36    7y+42 (y+6)² 7(y+6)

= 3 + 15y+57 - 2= 7*3+15y+57-2*7(y+6) =21+15y+57-14y-84 =
y+6 7(y+6) 7(y+6) 7(y+6)

= y-6
7(y+6)

9) x+3 + 12 =x+3 +   12   = -x-3 +      12 =
x²-3x 9-x² x(x-3) (3-x)(3+x) x(3-x) (3-x)(3+x)

=-(x+3)(3+x) +12x =12x-x²-6x-9 = -x²+6x-9 =-(x²-6x+9) =
x(3-x)(3+x) x(3-x)(3+x) x(3-x)(3+x) x(3-x)(3+x)

= - (3-x)²   = -(3-x) =   x-3
x(3-x)(3+x) x(3+x) x²+3x

2 votes Thanks 1

Answers & Comments

himiyanazvat veshestvo po formule chto eto

pomogite reshit sistemuochen srochnoe6a496d6344a7aec3258f679229e52eb 86349

pomogite s himiej7 klasscepochki 1hcl h2 h2o koh k2so4 2p p2o5 h3po4 c

pomogite7 klass iz privedennogo ryada veshestv naohh2so4caoh2znoh2al

pomogite pozhalujstaskolko mozhetesrochno25 ballov

pomogitealgebraochen srochno nuzhno iskat zamenu skoree vsego ne mogu

рекомендуемые вопросы

Helpful Links

Helpful Social