(x-6)² +(x+6)² + (2x+3)(2x-3)=
(x-6)² +(x+6)² + (2x+3)(2x-3)=
(x-6)² +(x+6)² + (2x+3)(2x-3)= x²-12x+36+x²+12x+36+4x²-9 = 6x²+63
(x-6)² +(x+6)² + (2x+3)(2x-3) = x² - 12x + 36 + x² + 12x + 36 + 4x²- 9= = 6x² + 63
(x-6)² +(x+6)² + (2x+3)(2x-3)=x²-12x+36+x²+12x+36+4x²-9=2x²+72+4x²-9= 6x²+63