Question

Biến đổi tổng sau thành tích: (3x – 1)2 – (2x – 5)2

Answer 1

(3x - 1)² - (2x - 5)²

= (3x - 1 - 2x + 5)(3x - 1 + 2x - 5)

= (x + 4)(5x - 6)

Answer 2

\(\left(3x-1\right)^2-\left(2x-5\right)^2\)

\(=\left(3x-1-2x+5\right)\left(3x-1+2x-5\right)\)

\(=\left(x+4\right)\left(5x-6\right)\)