Question

15(5x-4)^2 -10(5x- 4)

Answer 1

$15(25x {}^{2} + 16 - 40x) - 10(5x - 4) \\ = 375x {}^{2} + 240 - 600x - 50x + 40 \\ = 375x {}^{2} - 650x + 280 \\ = 5(75x {}^{2} - 130x + 56 ) \\ = 5(75 x {}^{2} - 60x - 70x + 56) \\ = 5(15x)(5x - 4) - (14)(5x - 4) \\ = 5(15x - 14)(5x - 4)$

Answer 2

Bonjour!

=> 15(5x - 4)² - 10(5x - 4)

=> 15(5x - 4)(5x - 4) - 10(5x - 4)

=> (5x - 4)(15(5x - 4) - 10)

=> (5x - 4)(75x - 60 - 10)

=> (5x - 4)(75x - 50)

=> (5x - 4)(25(3x - 2))

=> 25(5x - 4)(3x - 2)

Hope this helps...:)