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Verified answer
Rumus:a² - b² = (a + b)(a - b)
x² - 49 = (x + 7)(x - 7)
Verified answer
X^2-49x^2+0-49
a=1
b=0
c=-49
x^2+0x-49
(x-7)(x+7)
X1=7
X2=-7