Question

If (3a+ 3 a )=5, what is the value of 9a2+ 9 a2

Answer 1

Solution:

Given (3a+3a) = 5

=> 2×(3a) = 5

=> 3a = 5/2 ---(1)

Now,

the value of 9a²+9a²

= (3a)²+(3a)²

= 2×(3a)²

= 2×(5/2)²

= 2×(25/4)

= 25/2

Therefore,

9a²+9a² = 25/2 = 12.5

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