Question

Reducir:(x+10)²+(x+3)²- 2x²

Answer 1

(x+10)²+(x+3)²-2x²
x²+20x+100+x²+6x+9-2x²
26x+109

Answer 2

(x + 10)² + (x + 3)² -  2x²

(x + 10)² + (x + 3)² -  2x²

(x² + 2x * 10 + 10²) + (x² + 2x * 3 + 3²) - 2x²

(x² + 20x + 100) + (x² + 6x + 9) - 2x²

x² + 20x + 100 + x² + 6x + 9 - 2x²--Reducimos términos semejantes.

x² + x² + 20x + 6x - 2x² + 100 + 9 

2x² + 26x - 2x² + 109

2x² - 2x² + 26x + 109

26x + 109

Solución : 

26x + 109