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Solve the following quadratic equation by the factorisation method:
x2 - 8x + 16 = 0
x = 2, 2
x = 8, 16
x = 1, 2
x = 4, 4
(x - 4)2 = 0
x = 4, x = 4
x2 - 9 = 0
x = 3, 3
x = 9, 9
x = 3, −3
x = −9, 9
a2 - b2 = (a + b)(a - b)
(x - 3)(x + 3) = 0
x2 + 2√2x - 6 = 0
x = 3√2, √2
x = −3√2, √2
x = 3√2, −√2
x = −3√2, −√2
x2 + 3√2x - √2x - 6 = 0
x(x + 3√2) - √2(x + 3√2) = 0
(x + 3√2)(x - √2) = 0
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