50

Теория, примеры и задачи

− + 3 = 4,

( ) + (3 ) = 4,

= 2;

(− )(3 ) = 6.

−

−

2 − 4 − 6 = 0 1,2 = 2 ± √

10

.

1.

−

−

√

8

√

= 2

10,

2√10

= −2 + 10,

3( + ) = 2 + √

=

−

10;

3 .

2.

√

√

−

= 2 + 10,

8+2√10

= −2 − 10,

3( + ) = 2 − √

=

10;

3 .

−

2√

),

8+2√

).

8

10

10

Ответ: (−2 + √10;

3

(−2 − √10;

3

96.

+ 5 = 7,

97.

7 − 4 = 2,

98.

2 − 5 = −4,

= 2.

= 6.

= 6.

99.

3 − 7 = 8,

100. 5 + = −5,

101. 5 − 2 = 10,

= 5.

=

10.

= 20.

−

§ 2. Симметрия относительно выражений

51

102. 11 − 3 = 3,

103.

2 + 3 = 43,

104.

5 − 4 = 5,

= 30.

= 72.

= 15.

105. 3 + 4 = 2,

106.

− 7 = −1,

107.

2 + 5 = −2,

=

−

4.

= 6.

=

−

12.

108. 2 + 5 = 2,

109.

2 − 5 = 10,

110.

3 − = 8,

= 5.

= 2.

= 2.

111. 7 + 2 = 20,

112. 3 − 2 = 3,

113.

2 + 6 = 13,

=

−

1.

=

−

3.

= 2.

114. 2 − 9 = 5,

115. 7 − 5 = −14,

116.

3 + 6 =−18,

=

−

2.

= 1.

= 3.

117.

+ = 5,

118.

+ = −3,

5.

( + 2)( + 3) = 24.

(

−

2)( + 1) =

−

119.

+ = 7,

3) = 8.

120.

+ = 4,

( + 2)(

−

( + 3)( + 3) = 24.

121.

+ = −7,

122. + = 2,

3) =

12.

(

−

2)( + 2) = 12.

( + 5)(

−

−

52

Теория, примеры и задачи

123.

+ = 20,

124. + = −12,

(

−

8)(

−

2) = 16.

( + 10)( + 6) = 4.

125.

+ = 5,

126.

+ = 7,

3) = 2.

( + 1)( + 2) = 7.

(

−

1)(

−

127.

+ = 2,

2) = 5.

128.

+ = 8,

( + 3)(

−

( + 2)( + 4) = 2.

129.

+ = −6,

130.

+ = 1,

6) = 2.

(

−

2)( + 5) = 3.

(

−

5)(

−

131.

+ = 3,

132.

+ = 2,

3.

(

−

5)( + 6) = 4.

( + 1)( + 2) =

−

133.

2 + 3 = 8,

134.

5 − = 2,

( + 2)( + 1) = 9.

( + 3)(

−

2) = 4.

135.

3 + 4 = −7,

136.

− 7 = 1,

(

−

5)( + 2) =

−

6.

(

−

2)(

−

3) =

12.

−

137.

3 + = −2,

138.

2 − 5 = −1,

( + 3)(

−

5) =

−

8.

( + 3)( + 5) = 30.