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a, x(a - b) + (a - b)
= (x + 1)(a - b)
b, x(a + b) - a - b
= x(a + b) - (a + b)
= (x - 1)(a + b)
c, 10ax - 5ay - 2x + y
= 5a(2x - y) - (2x - y)
= (5a - 1)(2x - y)
d, 2a^2x - 5by - 5a^2y + 2bx
= 2x(a^2 + b) - 5y(b + a^2)
= (2a - 5y)(a^2 + b)
làm tiếp:
2ax2 - bx2 - 2ax +bx +4a-2b
= x2(2a-b) - x(2a-b) +2(2a-b)
=(2a-b)(x2-x+2)
a) Ta có: \(x^2-2xy+y^2-2x+2y\)
\(=\left(x-y\right)^2-2\left(x-y\right)\)
\(=\left(x-y\right)\left(x-y-2\right)\)
b) Ta có: \(x^2-4x+4-x^2y+2xy\)
\(=\left(x-2\right)^2-xy\left(x-2\right)\)
\(=\left(x-2\right)\left(x-2-xy\right)\)
a) Ta có: \(a^2-b^2-5a+5b\)
\(=\left(a-b\right)\left(a+b\right)-5\left(a-b\right)\)
\(=\left(a-b\right)\left(a+b-5\right)\)
b) Ta có: \(a^2-b^2-3ab^2-3a^2b\)
\(=\left(a-b\right)\left(a+b\right)-3ab\left(a+b\right)\)
\(=\left(a+b\right)\left(a-b-3ab\right)\)
a, (4x+4y)+(by+bx)= 4(x+y)+b(x+y)=(x+y)(4+b)
b, ( 2x2+xy)-(2x+y)= x(2x+y)-(2x+y)=(2x+y)(x-1)
c, (3ax-2bx)-(6ay-4by)= x(3a-2b)-2y(3a-2b)=(3a-2b)(x-2y)
d, (ma+na-pa)-(mb+nb-pb)= a(m+n+p)-b(m+n-p)=(m+n+p)(a-b)
a) 4x+bx+by+4y b)2x2+xy-2x-y c)3ax-2bx-6ay+4by d)ma-mb+na-nb-pa+pb
=x(4+b)+y(b+4) =2x(x-1)+y(x-1) =3ax-6ay-2bx+4by =m(a-b)+n(a-b)-p(a-b)
=(x+y)(b+4) =(x-1)(2x+1) =3a(x-2y)-2b(x-2y)=(3a-2b)(x-2y) =(a-b)(m+n-p)
a: \(x^2-4xy+4y^2-2x+4y-35\)
\(=\left(x^2-4xy+4y^2\right)-\left(2x-4y\right)-35\)
\(=\left(x-2y\right)^2-2\left(x-2y\right)-35\)
\(=\left(x-2y\right)^2-7\left(x-2y\right)+5\left(x-2y\right)-35\)
\(=\left(x-2y\right)\left(x-2y-7\right)+5\left(x-2y-7\right)\)
\(=\left(x-2y-7\right)\left(x-2y+5\right)\)
c: \(\left(xy+ab\right)^2+\left(ay-bx\right)^2\)
\(=x^2y^2+a^2b^2+2xyab+a^2y^2-2aybx+b^2x^2\)
\(=x^2y^2+a^2y^2+a^2b^2+b^2x^2\)
\(=y^2\left(x^2+a^2\right)+b^2\left(a^2+x^2\right)\)
\(=\left(x^2+a^2\right)\left(y^2+b^2\right)\)
\(=x\left(x+y\right)-2\left(x+y\right)=\left(x+y\right)\left(x-2\right)\)
x2-xy+2x-2y
= (x2-xy)+(2x-2y)
= x(x-y)+2(x-y)
= (x-y)(x+2)
ax+ay-2x-2y
= (ax+ay)-(2x+2y)
= a(x+y)-2(x+y)
=(x+y)(a-2)
ax2-3axy+bx-3by
= (ax2+bx)-(3axy+3by)
= x(ax+b)-3y(ax+b)
= (ax+b)(x-3y)
2a2-5by-5a2y+2bx
= (2a2-5a2y)+(2bx-5by)
= a2(2-5y)+b(2x-5y)