РЕШЕНИЕ:

a²​−9b² ⋅ __a__ =
4a² ___a+3b

(a ​−3b)(a+3b) ⋅ __a__ =
4a² ____ _______ a+3b

a-3b ⋅ __1__ =
4a ______ 1

a-3b =
4a

1 + 8b =
___ 4a

1 + 8√125 =
4 ___ 4√5

= 1/4 + 40/4 = 41/4 = 10.25

Ответ: 10.25

РЕШЕНИЕ:

a²​−16b² ⋅ __a__ =
a² ______ a−4b

(a ​−4b)(a+4b) ⋅ __a__ =
a² ____ _______ a−4b

a+4b ⋅ __1__ =
a ______ 1

a+4b =
a

1 + 4b =
___ a

1 + 4√216 =
___ √54

= 1 + 8 = 9

Ответ: 9

РЕШЕНИЕ:

a²​−49b² : ab-7b² =
____a² ___ a

(a-7b)(a+7b) ∙ a_____ =
____a² _____ b (a-7b)

a+7b =
ab

-12+7 ∙ 30 =
-12 ∙ 30


198 = - 0.55
-360

Ответ: - 0.55

РЕШЕНИЕ:

a²​−64b² ⋅ __a__ =
a² ______ a−8b

(a ​−8b)(a+8b) ⋅ __a__ =
a² ____ _______ a−8b

a+8b ⋅ __1__ =
a ______ 1

a+8b =
a

1 + 8b =
___ a

1 + 8√405 =
___ √45

= 1 + 24 = 25

Ответ: 25

РЕШЕНИЕ:

___a__ : ___a__ =
a^2​−b² __ ab+b²

___a__ __ ∙ b(a+b) =
(a-b)(a+b) __ a

_b__ =
a-b

_0.6__ =
1.1 - 0.6

_0.6 = 1.2
0.5

Ответ: 1.2

РЕШЕНИЕ:
9 b ⋅ a(a ​−b)
a−b___ 72b

9a
72

a
8

90 = 11.25
8

Ответ: 11.25