Question

(2x+3)^2-4(3+2x)

Answer 1

\(\left(2x+3\right)^2-4\left(3+2x\right)=4x^2+12x+9-12-8x=4x^2+4x+3\)

Answer 2

(2x + 3)² - 4(3 + 2x)

= 4x² + 12x + 9 - 12 - 8x

= 4x² + 4x - 3

Answer 3

Làm bằng cách phân tích thành nhân tử:

(2x + 3)² - 4(3 + 2x)

= (2x + 3)² - 4(2x + 3)

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

= (2x + 3)(2x - 1)