Автор - darxayzendarxayzen

Нужно выполнить, срочно. С решениями, можете на бумаге и сфоткать. Как угодно, но сделать с решением

Ответ

Автор - terekosmayev

 - (3 +  {b}^{2} )(3 -  {b}^{2} ) -  {b}^{4}  + 2 {b}^{2}  =  \  - 9 +  {b}^{4}  -  {b}^{4}  + 2 {b}^{2}  =  2{b}^{2}  - 9

6 {a}^{3}  {b}^{2}  + 6 {a}^{2} b^{3} +  6 {a}^{2} b^{3} + 6ab ^{4}  =  \ 6 {a}^{2}  {b}^{2} (a + b) + 6ab^{3}(a + b)  =  \ (a + b)(6 {a}^{2}  {b}^{2}   + 6a {b}^{3} ) \  = (a + b)(6ab^{2} )(a + b) =  \ 6ab^{2} ( {a + b)}^{2}

a(a - 5)(a - 5 )^{2}  +  {a}^{2} (a - 5 )^{2}  =  \ (a - 5^{2} )( {a}^{2}  - 5a +  {a}^{2} ) =  \ (2 {a}^{2}  - 5a)( {(a - 5)}^{2}

3x - 6 +  {x}^{2}  - 2x = 0 \ 3(x - 2) + x(x - 2) = 0 \ (x - 2)(3 + x) = 0 \  = 2 \ x =  - 3

2x + 4y = 70 \ x + y = 25 \ x = 25 - y \ 50 - 2y + 4y = 70 \ 2y = 20 \ y = 10 \ x = 15

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