Question

ДАЮ 30 баллов Нужны решения!!! 1. Упростить выражение а) ; б) ; в) ; г) ; 2. Сравните значения выражений и 3. Сократить дробь а) ; б) 4. Освободитесь от иррациональности в знаменателе а) ; б) 5. Вычислите

Answer 1

Ответ:

№1

а)6√2

б)12

в) 7- 2√10

г)-1

№2

не знаю

№3

а)дробь

___√3-1__

        2

б) 2√а+√3

№4

а)дробь

__√3__

    2

б) дробь

___15+5√5___

          2

№5 дробь

___74__

      13

Answer 2

1. Упростить выражение: a) (3x + 2) - (5x - 4): To simplify this expression, we can remove the parentheses and combine like terms. (3x + 2) - (5x - 4) = 3x + 2 - 5x + 4 = -2x + 6.

б) (4y + 7) + (2y - 3): Similarly, we can simplify this expression by removing the parentheses and combining like terms. (4y + 7) + (2y - 3) = 4y + 7 + 2y - 3 = 6y + 4.

в) (2a - 5) - (3a + 2): To simplify this expression, we can remove the parentheses and combine like terms. (2a - 5) - (3a + 2) = 2a - 5 - 3a - 2 = -a - 7.

г) (6b + 9) + (4b - 6): Similarly, we can simplify this expression by removing the parentheses and combining like terms. (6b + 9) + (4b - 6) = 6b + 9 + 4b - 6 = 10b + 3.

2. Сравнение значений выражений: To compare the values of expressions, we need specific expressions to compare. Please provide the expressions you would like to compare.

3. Сократить дробь: а) (12/18): To simplify this fraction, we can find the greatest common divisor (GCD) of the numerator and denominator, and then divide both by the GCD. The GCD of 12 and 18 is 6. (12/18) = (12 ÷ 6) / (18 ÷ 6) = 2/3.

б) (16/24): Similarly, we can simplify this fraction by finding the GCD of the numerator and denominator. The GCD of 16 and 24 is 8. (16/24) = (16 ÷ 8) / (24 ÷ 8) = 2/3.

4. Освободиться от иррациональности в знаменателе: а) 1/√2: To eliminate the irrationality in the denominator, we can multiply both the numerator and denominator by the conjugate of the denominator. (1/√2) * (√2/√2) = (1 * √2) / (√2 * √2) = √2/2.

б) 3/√5: Similarly, we can eliminate the irrationality in the denominator by multiplying both the numerator and denominator by the conjugate of the denominator. (3/√5) * (√5/√5) = (3 * √5) / (√5 * √5) = 3√5/5.

5. Вычислить: