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(2+2)²=(4)²=16
(2x+3)(2x-3)= (2x)²-3²
16+4x²-9+4x²-9+(3x)²+2(3x)(3)+(3)²
16+4x²-9+4x²-9+9x²+18x+9
17x²+18x+7
Resolver.
(2 + 2)² + (2x + 3)(2x - 3) + (2x + 3) (2x - 3) - (3x + 3)²
2² + 2(2)(2) + 2² + 4x² - 9 + 4x² - 9 - 3x² + 9x² + 2(3x)(3) + 3²
4 + 8 + 4 + 4x² - 9 + 4x² - 9 - 3x² + 9x² + 18x + 9
16 + 4x² - 9 + 4x² - 9 - 3x² + 9x² + 9 + 18x
16 - 9 - 9 + 9 + 4x² + 4x² - 3x² + 9x² + 18x
7 + 18x + 14x²