Question

resolva:

a) 3ײ-48=0
b)2ײ+6×=0
c) 7ײ=14×
d)4ײ-36=0
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Answer 1

(A) 3ײ-48=0

X²-16=0

X²=16

X=±4

X= -4

X1= -4,x2=4

(B)2ײ+6×=0

2X×(X+3)=0

X×(X+3)=0

X=0

X+3=0

X=0

X= -3

X,= -3,X2=0

(C)7ײ=14×

X²=2X

X²-2X=0

X×(X-2)=0

X=0

X-2=0

X=0

X=2

X,=0,X2=2

(D)4ײ-36=0

X2-9=0

X²=9

X=±3

x= -3

X=3

X1= -3,X2=3