Ta co x/2 = y/5 =>x=(2y)/5  (1)

Lai co xy =10 (2)

Thay (1) vao (2) ta duoc (2y)/5.y=10=>(2y²)/5=10=>y²=10.(5/2)=>y²=25=>y=5 va y=-5

Cho hcn ABCD : AB=2AD, A(1;2). C thuộc đt d: 2x-y-5=0. M thuộc CD sao cho DM=2CM. Pt BM: 5x+y-19=0. Tìm tọa độ B,C,D biết đt AB có hsg nguyên.

m=? hàm số xác định với mọi \(x\in R\)

1. \(y=1-\sqrt{m\left(m+2\right)x^2+2mx+2}\)

\(2.y=\frac{x^2+x-2}{\sqrt{\left(1-m\right)x^2-2mx+5-9m}}\)

Sai đề 100% rồi bạn Haibara Ai gì gì đó ơi

Viết lại câu với những từ cho sẵn:

1. Recent laws/ prohibit/ specific types/ job discrimination/ certain workplaces/ promoted/ equal employment opportunity/ USA.

2. Everyone/ live/ Earth/ should have/ responsibility/ reduce/ air pollution/ protect clean air/ our survival.

3. Worldwide governments/ should/control measures/ reduce airr pollution/ and/ protect/ natural environment/ future generation.

4. lot/ people/ choose/ favorable dates/ occasions/ such/ wedding/ funeral/ house moving days.

5. Nowadays/ our lives/ improved/ much/ progresses/ science and technology.