Question

ECUACIONES X2-49=0 X2-81=0 3X2=75 2X2=32 4X2-36=0 10X2-40=0


X2= 4-25 URGENTE

Answer 1

x²-49=0
(x-7)(x+7)=0

x-7=0
x= 7

x+7=0
x= -7



x²-81=0
(x-9)(x+9)=0

x-9=0
x= 9

x+9= 0
x= -9


3x²=75
x²= 75/3
x²= 25
x= √25

x= 5

x= -5


2x²=32
x²= 32/2
x²= 16

x= 4

x= -4


4x²-36=0
x² = 36/4
x= √9

x= 3

x= -3


10x²-40=0
x²= 40/10
x= √4

x= 2

x= -2


x²= 4-25
x²= -21
x= √-21
S.i no hay raíz de un numero negativo.

Salu2.

Suerte... :)