Question

factorise
$(5x + 2) {}^{2} - (3x + 1) {}^{2}$
​

Answer 1

(5x+2)² -(3x+1)²

25x² +4 +20x -9x² - 1 -6x.

16x² + 3 + 14x

16x² + 14x +3

16x² + 8x +6x +3

8x (2x +1) +3(2x+1)

(2x+1)(8x+3)