Question

(2x+3)²-x(x-4) simplifique as expressao

Answer 1

(4x²+2.3.2x+9)-x²+4x
4x²+12x+9-x²+4x
3x²+16x+9

Answer 2

= (2x + 3)² - x.(x - 4)
= 4x² + 2.3.2x + 9 - x² + 4x
= 4x² + 12x + 9 - x² + 4x
= 4x² - x² + 12x + 4x + 9
= 3x² +16x + 9