Question

19. Find the product using suitable identities

(2a +3b).(2a -5b) ​

Answer 1

Step-by-step explanation:

2a(2a-5b)+3b(2a-5b)

4a²-10ab+6ab-15b²

4a²-4ab-5b²

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Answer 2

4a

$4b2 - 4ab - 15 {b }^{2}$