Question

(x + 3)2 – (x - 3)2 + (2x + 3)(2x - 3) = 4x(x + 2)

Answer 1

(x + 3)2 – (x - 3)2 + (2x + 3)(2x - 3) = 4x(x + 2)

2x + 6 - (x - 3) × 2 + (2x + 3) × (2x - 3) = 4x × (x + 2)

2x + 6 - (2x - 6) × (2x + 3) × (2x - 3) = 4x × (x + 2)

2x + 6 - (2x - 6) + 4x² - 9 = 4x × (x + 2

2x + 6 - (2x - 6) + 4x² - 9 = 4x² + 8x

2x + 6 - (2x - 6) - 9 = 8x

2x + 6 - 2x + 6 - 9 = 8x

6 + 6 - 9 = 8x

3 = 8x

8x = 3

8x ÷ 8 = 3 ÷ 8

x = 3 ÷ 8

El resultado sería: x = 3/8