Question

9. A side of square with area (4x²+12x+9) square unit is--
(i) (4x+3) units (ii) (4x+9) units (iii) (2x+3) units (iv) (x+3) units​

Answer 1

Answer:

4x²+12x+9

=(4x²+6x+6x+9)

=2x(2x+3)+3(2x+3)

=(2x+3)(2x+3)

=(2x+3) units