Question

(3x+9)power2=? maths problem

Answer 1

= (3x) ^2+(9) ^2+2× 3x × 9 [(a+b) ^2= a^2+b^2+2×a×b) ]

= 9x^2+81+54x

Answer 2

Answer:

Step-by-step explanation:

Here identity used: (a+b)²= a² + b² + 2ab

(3x+9)² = (3x) ²+ 9²+ 2×3x ×9

= 9x² + 81 + 54x

9x² + 54x +81

Dividing by 9

= x²+6x+9

= x²+3x+3x+9

=x(x+3)+3(x+3)

=(x+3)(x+3)

x+3=0. ; x+3=0

x=-3. ; x = -3

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