Question

fatore cada expressão abaixo:

a)xy-3x+y-3
b)a²-4b²
c)a²-10a+25
d)2x²-3x+4xy-6y
e)12x²-21x


ajuda aii gente pfvr:''(

Answer 1

x(y-3)1(y-3)
(x+1)(y-3)

b)

a²-4b²
(a-2b)(a+2b)

c)

a²-10a+25
(a-5)²

d)

2x²-3x+4xy-6y
2x(x+2y)-3(x+2y)
(2x-3)(x+2y)

e)

12x²-21x
3x(4x-7)

Answer 2

a) xy-3x+y-3 ==>  x(y-3)+ 1(y-3) ==>  (x + 1)(y-3) 
 
b)a²-4b² = (a+2b)(a-2b)

c)a²-10a+25 ==> ( a - 5)^2

d)2x²-3x+4xy-6y ==> x(2x - 3)+ 2y(2x-3) ==> (x+ 2y)(2x-3) 

e)12x² - 21x ==> 3x(4x - 7)