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Grade:11

1 Answers

Arun
25758 Points
2 years ago
Dear student
 
A1² + A2² + 2 A1.A2 = 25
 
2 A1.A2 = -9
A1.A2 = -9/2
 
Now
(2A1 + 3A2) . (3A1 - 2A2) = 6 A1² - 6A2² + 5A1.A2
 
 = 54 - 150 - 22.5
 = - 118.5

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