x² - 16 = 0
(x + 4)(x - 4) = 0
x + 4 = 0 x - 4 = 0
x = - 4 x = 4
CS = (-4 ; 4)
x² - 49 = 0
(x + 7)(x - 7) = 0
x + 7 = 0 x - 7 = 0
x = - 7 x = 7
CS = (-7 ; 7)
x² - 144 = 0
(x + 12)(x - 12) = 0
x + 12 = 0 x - 12 = 0
x = - 12 x = 12
CS = (-12 ; 12)
2x² - 18 = 0
2(x² - 9) = 0
(x² - 9) = 0/2
(x² - 9) = 0
(x + 9)(x - 9) = 0
x + 9 = 0 x - 9 = 0
x = - 9 x = 9
CS = (-9 ; 9)
Eternamente axllxa
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Verified answer
x² - 16 = 0
(x + 4)(x - 4) = 0
x + 4 = 0 x - 4 = 0
x = - 4 x = 4
CS = (-4 ; 4)
x² - 49 = 0
(x + 7)(x - 7) = 0
x + 7 = 0 x - 7 = 0
x = - 7 x = 7
CS = (-7 ; 7)
x² - 144 = 0
(x + 12)(x - 12) = 0
x + 12 = 0 x - 12 = 0
x = - 12 x = 12
CS = (-12 ; 12)
2x² - 18 = 0
2(x² - 9) = 0
(x² - 9) = 0/2
(x² - 9) = 0
(x + 9)(x - 9) = 0
x + 9 = 0 x - 9 = 0
x = - 9 x = 9
CS = (-9 ; 9)
Eternamente axllxa