Question

23. Expand ( 3x+ 1)2 using suitable identity.​

Answer 1

Step-by-step explanation:

(3x+1)^2 ... given

by using th following identity

(a+b)^2 = a^2 + 2ab + b^2

Here ; a = 3x , b = 1

(3x+1)^2 = (3x)^2 + 2 × 3x × 1 + (1)^2

= 9x^2 + 6x + 1

(3x+1)^2 = 9x^2 + 6x + 1