Đáp án: x^2y^2+4xy-5
Giải thích các bước giải: xy(xy+5)+(-1)(xy+5)
=x^2y^2+5xy-xy-5
=x^2y^2 +4xy-5
= (xy)^2 + 5xy - xy - 5
= x^2*y^2 + 4xy - 5
=
Choose the best answer.
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Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.