Question

x²-5x+6=0
2x²-10x-12=0
3x²-21x+9=0
x²-2x-8=0
3x²+10x+3=0
9x²-12x-1=0

me ajudem pfvrrr​

Answer 1

Explicação passo-a-passo:

a) X²-5X+6=0

X²-2X-3X+6=0

X×(X-2)-3X+6=0

X×(X-2)-3(X-2)=0

(X-2)×(X-3)=0

X-2=0

X-3=0

X=2

X-3=0

r:X =2,X =2

1 2

b) 2X²-10X-12=0

X²-5X-6=0

X²+X-6X-6=0

X×(X+1)-6X-6=0

X×(X+1)-6(X+1)=0

(X+1)×(X-6)=0

X+1=0

X-6=0

X=-1

X-6=0

X=-1

X=6

X =-1,X =6

1 2