Question

(x+2)(x-2)-(x-3)(x+1) Rút gọn nó cho mik vs nà!!! u

Answer 1

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

= x² - 4 - x² - x + 3x + 3

= (x² - x²) + (3x - x) + (3-4)

= 2x - 1

Answer 2

\(\left(x+2\right)\left(x-2\right)-\left(x-3\right)\left(x+1\right)\)

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

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

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

\(=3x-1\)

Chúc bạn học tốt!!!

Answer 3

(x^​2​+2^​2​)-x(3+1)

Answer 4

\(\left(x+2\right)\left(x-2\right)-\left(x-3\right)\left(x+1\right)\)

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

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

\(=2x-1\).

Answer 5

vo van ve dau tien rut gon thanh hang dang thuc xong roi ve kia nhan het vao