Question

a)X²-7×+10=0 b)X²-6×+9=0 C)2X²+×+5=0​

Answer 1

Explicação passo-a-passo:

A)X²-2x-5x-10=0

(x-2) - 5x+10=0

(x-2)-5 (x-2)=0

(x-2) x (x-5)=0

x-2=0

x=5=0

x-2+2=0+2

x=0+2

x=2

x=2 x=5

X1=2,X²=0

B) (X-3)²=0

X-3=0

X=3