Bài làm

a) 6x³ + x²yy + 23xy² + 12y³

= ( 2x + y ) ( 3x² - xy + 12y² )

# Học tốt #

nhanh lên mọi người , mình đang cần gấp

câu 3 nhaa bn 

\(=AI+h_2O+AI\left(OH\right)_3=\)\(H_2\)

\(2Na+2H_2O\rightarrow2NaOH+H_2\)

\(Ca+2H_2O\rightarrow Ca\left(OH\right)_2+H_2\)

\(2Al+6H_2O\rightarrow2Al\left(OH\right)_3+3H_2\)

\(P_2O_3+3H_2O\rightarrow2H_3PO_3\)

\(P_2O_5+3H_2O\rightarrow2H_3PO_4\)

Ý a có rì đó sai sai nha bn 

\(x^2-xy+x^2y-xy^2=x\left(x-y\right)+xy\left(x-y\right)=\left(x-y\right)\left(y+1\right)x\)

\(\text{a) }x^8+x^6+x^4+x^2\)

\(=\left(x^8+x^6\right)+\left(x^4+x^2\right)\)

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

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

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

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

Bạn phát ơi bạn làm lại đc ko mk ghi thiếu đề

X⁸+X⁶+X⁴+X²+1

Sao cho j bn ???

Sao cho ...

:)

\(\left(a-b\right)\left(a^2+3ab+b^2\right)+\left(a+b\right)^3+ab\left(b-a\right)\)

\(=\left(a-b\right)\left(a^2+3ab+b^2-ab\right)+\left(a+b\right)^3\)

\(=\left(a-b\right)\left(a+b\right)^2+\left(a+b\right)^3=\left(a+b\right)^2\left(a-b+a+b\right)=2a\left(a+b\right)^2\)

\(\left(a-b\right)\left(a^2+3ab+b^2\right)+\left(a+b\right)^3+ab\left(b-a\right)\)

\(=\left(a-b\right)\left(a^2+3ab-ab+b^2\right)+\left(a+b\right)^3\)

\(=\left(a-b\right)\left(a^2+2ab+b^2\right)+\left(a+b\right)^3\)

\(=\left(a-b\right)\left(a+b\right)+\left(a+b\right)^3\)

\(=\left(a+b\right)^2\left(a+b+a-b\right)\)

\(=\left(a+b\right)^2.2a\)