Question

Сделайте с объяснениями пожалуйста !!!

Answer 1

Объяснение:

$1)(n + 2)(n + 3) - (n - 1)(n - 6) = {n}^{2} + 5n + 6 - ( {n}^{2} - 7n + 6) = {n}^{2} + 5n + 6 - {n}^{2} + 7n - 6 = 12n$

$2)(x - 5)(x + 5) - (2x + 1)(x - 2) = 1 - {x}^{2} \\ {x}^{2} - 25 - (2 {x}^{2} - 3x - 2) = 1 - {x}^{2} \\ {x}^{2} - 25 - 2 {x}^{2} + 3x + 2 = 1 - {x}^{2} \\ - {x}^{2} + 3x - 23 = 1 - {x}^{2} \\ 3x = 24 \\ x = 8$

$3)( - 2 a{b}^{4} ) {}^{2} {( - 3 {a}^{3} b)}^{2} = 4 {a}^{2} {b}^{8} \times 9 {a}^{6} {b}^{2} = 36 {a}^{8} {b}^{10}$

$4) {(x - 2)}^{2} - 4( {x}^{2} - 2) + 4 = {x}^{2} - 4x + 4 - 4 {x}^{2} + 8 + 4 = - 3 {x}^{2} - 4x + 16$

Answer 2

Ответ:

12n

x=8

36a⁸b¹⁰

Объяснение:

n²+3n+2n+6-(n²-6n-n+6)

n²+3n+2n+6-(n²-7n+6)

n²+3n+2n+6-n²+7n-6

3n+2n+6+7n-6

3n+2n+7n

12n

x²-25-(2x²-4x+x-2)=1-x²

x²-25-(2x²-3x-2)=1-x²

x²-25-2x²+3x+2=1-x²

-x²-23+3x=1-x²

-23+3x=1

3x=1+23

3x=24

x=8

(2ab⁴)²×(3a³b)²

4a²b⁸×9a⁶b²

36a⁸b¹⁰

(x²-2-2)²

(x²-4)²

((x-2)(x+2))²