Question

RESOLVA AS EQUAÇOES DO 2GRAU:
a)x2-49=0
b)(x+5)2=25

Answer 1

a) x^2-49=0
x^2=0+49
x^2=49
x= raiz de 49
x=-/+ 7
b) (x+5)^2=25
x^2+2.x.5+5^2=25
x^2+10x+25=25
x^2+10x+25-25
x^2+10x=0
x(x+10)=0
x=0
x+10=0
x=0-10
x=-10