First, let's simplify the expression inside the parentheses:
(x-6)(6+4x) = 6x + 4x^2 - 36 - 24x-3(1-x) = -3 + 3x
Now, let's square the result:
(6x + 4x^2 - 36 - 24x - 3 + 3x)^2= (4x^2 - 18x - 39)^2
Expanding this expression gives:
= 16x^4 - 144x^3 + 624x^2 - 468x - 1521
First, let's simplify the expression inside the parentheses:
(x-6)(6+4x) = 6x + 4x^2 - 36 - 24x
-3(1-x) = -3 + 3x
Now, let's square the result:
(6x + 4x^2 - 36 - 24x - 3 + 3x)^2
= (4x^2 - 18x - 39)^2
Expanding this expression gives:
= 16x^4 - 144x^3 + 624x^2 - 468x - 1521