Question

Como se factorizaria los siguientes polinomios:
X^2 + x - 2
A^2 + 7a + 10
Y^2 - 4y + 3
X^2 - 21x + 20

Answer 1

x2 +x-2=0
(x+2)(x-1)=0
x+2=0
x= -2
x-1=0
x=1

a2+7a+10=0
(a+5)(a+2)=0
a+5=0
a=-5
a+2=0
a=-2

y2-4y+3=0
(y-3)(y-1)=0
y-3=0
y=3
y-1=0
y=1

x2-21x+20=0
(x-20)(x-1)=0
x-20=0
x=20
x-1=0
x=1