ABOUBACRINA
Answered

factorise

2x²-18+(5x-7)(3-x)-(4x-12)(x+2)

aidez moi svp pour factorise ​

Sagot :

LOULAKAR

Bonjour


Factorise 2x²-18+(5x-7)(3-x)-(4x-12)(x+2)


= 2(x^2 - 9) + (5x - 7)(3 - x) - 4(x - 3)(x + 2)

= 2(x - 3)(x + 3) - (x - 3)(5x - 7) - 4(x - 3)(x + 2)

= (x - 3)[2(x + 3) - (5x - 7) - 4(x + 2)]
= (x - 3)(2x + 6 - 5x + 7 - 4x - 8)

= (x - 3)(-7x + 5)