Question

[ttt]

Thu gọn: 

\(B=\left(x-3\right)\left(x+3\right)\left(x^2+9\right)-\left(x^2+2\right)\left(x^2-2\right)\)

\(T=\left(x-5\right)\left(x+2\right)+3.\left(x-2\right)\left(x+2\right)-\left(3x-\frac{1}{2}\right)^2+5x^2\)

\(Q=\left(x-2\right)^3+6\left(x-1\right)^2-\left(x+1\right)\left(x^2-x+1\right)\)

Làm đc cái nào thì làm, ko bắt m.n làm cả đâu ! Làm đc hết thì mk cảm ơn!

Answer 1

[Kiyotaka Ayanokoji]

Trả lời:

\(B=\left(x-3\right).\left(x+3\right).\left(x^2+9\right)-\left(x^2+2\right).\left(x^2-2\right)\)

\(B=\left(x^2-9\right).\left(x^2+9\right)-\left(x^4-4\right)\)

\(B=\left(x^4-81\right)-\left(x^4-4\right)\)

\(B=x^4-81-x^4+4\)

\(B=-77\)

Answer 2

[Nguyễn Minh Huy]

bài nayfd dễ