Question

(A+b)¢2=? Find =ab. And a+b= 4
Do it in 10 sec

Answer 1

Step-by-step explanation:

on squring both sides

[a + b ]² = 4²

we get

a²+b²+2ab = 16 (by using formula of (a + b )²

Now value of a+b = 4

so (a+b)² + 4ab = 16 + 2ab

4 ² + 2ab = 16

16 + 2ab = 16

2ab = 16 - 16

ab = 0

hope it helps

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