\(a,10.a^6+20a^5=10a^5\left(a+2\right)\)
\(b,5x^2-10xy+5y^2=5\left(x^2-2xy+y^2\right)=5\left(x-y\right)^2\)
\(c,3ab^3+6ab^2-18ab=3ab\left(b^2+2b-1\right)\)
\(d,15x^3y^2+10x^2y^2-20x^2y^3=5x^2y^2\left(3x+2-4y\right)\)
\(e,a^2\left(x-1\right)-b\left(1-x\right)=a^2\left(x-1\right)+b\left(x-1\right)=\left(x-1\right)\left(a^2+b\right)\)
\(f,x\left(x-5\right)-4\left(5-x\right)=x\left(x-5\right)+4\left(x-5\right)=\left(x-5\right)\left(x+4\right)\)
(mk sửa lại thứ tự là a,b,c,d,e,f nha)
chúc bn học tốt
\(1,10a^6+20a^5=10a^5\left(a+10\right)\)
\(2,5x^2-10xy+5y^2=5\left(x^2-2xy+y^2\right)\)
\(=5\left(x-y\right)^2\)
\(3,3ab^3+6ab^2-18ab\)
\(=3ab\left(b^2+2b-6\right)\)
\(4,15x^3y^2+10x^2y^2-20x^2y^3\)
\(=5x^2y^2\left(3x+2-4y\right)\)
\(5,a^2\left(x-1\right)-b\left(1-x\right)\)
\(=a^2\left(x-1\right)+b\left(x-1\right)\)
\(=\left(x-1\right)\left(a^2+b\right)\)
\(6,x\left(x-5\right)-4\left(5-x\right)\)
\(=x\left(x-5\right)+4\left(x-5\right)\)
\(=\left(x+4\right)\left(x-5\right)\)
mk sửa lại câu 3 chút nha
\(3ab^3+6ab^2-18ab=3ab\left(b^2+2b-6\right)\)
xl vì sai sót
chúc bn học tốt nhé