Question

if 2a + 3b = 9 and 2a – 3b = 7 , then find the value of ‘ab’. ​

Answer 1

Answer:

Given ,

2a+3b=9

3b=9-2a

b=9-2a/3

2a-3b=7 ---》Substitute 'b' value

2a - 3(9-2a/3)=7

2a-(9-2a)=7

2a-9+2a=7

4a-9=7

4a= 9+7

4a=16

a=4

b=9-2a/3

=9-2(4)/3

=9-8/3

= 1/3

b=1/3

a=4 ; b=1/3

Answer 2

I hope it's helps

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