Question

Fatore
1-Bx+By=
2-4x²-25y²=
3-25+10x+x²=
4-9c²+25c²=
5-4x+4y+3y+3x=

Answer 1

1-Bx+By= B(x+y)
2-4x²-25y²=(2x+5y)(2x-5y)
3-25+10x+x²= (x+5)^2
4-9c²+25c²= 34c^2 ==> (34c).c
5-4x+4y+3y+3x==> 7x + 7y ==> 7(x+y)