A) X(5 – 2X) + 2X(X – 1) = 15 B) 4X2 – 36 = 0

Câu 2( 1.5đ) : Tìm x, biết: a) x(5 – 2x) + 2x(x – 1) = 15 b) 4x

2

– 36 = 0