Question

Fatore as expressoes:
a)10x² + 15xy - 4x -6y
b)xy + 2y - 3x -6
c)x^4 - 9

Answer 1

a) 10x² + 15 xy - 4x - 6y=
= 5x( 2x + 3y) -2( 2x + 3y)=
=(5x - 2) ( 2x + 3y)

b) xy + 2y -3x - 6=
 =  y(x + 2) -3(x + 2)=
= (x + 2)(y - 3)

c) x⁴ - 9 = 0
    x⁴ = 9 
    x =⁴√9