Question

if (2a+3b)=12 and (2a-3b)=20 then find the value of a.

Answer 1

Answer:

If 2A+3B= [23−1245] and A+2B= [510632], then B is  

A

[8−1−1102−1]

B

[8−11102−1]

C

[8−1110−2−1]

D

[8111021]

Medium

Answer

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Correct option is

B

[8−11102−1]

Since, 2A+3B=[

Answer 2

Answer:

Hi

Step-by-step explanation:

8a³-27b³

(2a-3b)³=8a³-27b³-18ab(2a-3b)

Formula used

(a+b)³=a³-b³-3ab(a-b)

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(3)³=8a³-27b³-18(2)(3)

27=8a³-27b³-108

27+108=8a³-27b³

135=8a³-27b³