78 = 60 + 18 = 13 x 6
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5x-13x+6=0 5x-13x=-6 -8x=-6 -8x/-8=-6/-8 x = 3/4
(8x2)-(13x-16)= -78
x + 13x + 10x = 50 - 6
42 + x2 = 13x ∴ x2 - 13x + 42 = 0 ∴ (x - 6)(x - 7) = 0 ∴ x ∈ {6, 7}
6x^2 -13x+6 = (3x-2)(2x-3) when factorized