Question

[Duong Thi Nhuong]

Giải

a) \(\left(x+2\right)\left(x+3\right)\left(x+8\right)\left(x+12\right)=4x^2\)

b) \(\dfrac{4x}{x^2-8x+7}+\dfrac{5x}{x^2-10x+7}=-1\)

c) \(x^2+\dfrac{x^2}{\left(x+1\right)^2}=15\)

Answer 1

[Akai Haruma]

Answer 2

[Akai Haruma]