Question

What is the answer for this solution and how??
(9+x)^2=(3+x)X (21+x)​

Answer 1

Answer:

x=18/22

Step-by-step explanation:

(9+x)^2 = (3+x) x (21+x)

81 + 2x + x^2 = 63 + 3x + 21x + x^2

81 + 2x +x^2 = 63 + 24x + x^2

18 = 22x

x = 18/22

Answer 2

Answer:

x=3

Step-by-step explanation:

(9+x) ^2=(3+x) *(21+x)

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

81+x^2+18x=21*3+3x+21x+x^2

81+18x=63+24x (x^2 gets elimininate as of it is transfer to right hand side positive sign tyrns inta negative sign)

81-63=24x-18x

18=6x

x=3