Question

(2x+5)(2x-7)-(-4x-3)(-4x-3)=16

 

Answer 1

=>2x(2x-7)+5(2x-7)-[4x(4x+3)+3(4x+3)]=16

=>4x²-14x+10x-35-16x²-12x-12x-9=16

=>-12x²-28x-44=16

=>-12x²-28x=60

=>x(12x-28)=-60

=>x,12x-28 E Ư(60)

Đến đây liệt kê ước rồi tìm x

Answer 2

[2x+5*2x-7]-[-4x-3*-4x-3=16

=>2x*(5-7)-(-4x-3)*(-3-(-3)=16

=>2x*(-2)-(-4x-3)*0=16

=>2x*(-2)-0=16

=>2x*(-2)=0

=>2x=0/(-2)

=>2x=0

=>x=0/2

=>x=0

nhớ k cho mk nhé