25*x^2 + 4 = 20*x 25*x^2 - 20*x + 4 = 0 25*x^2 - 10*x - 10*x + 4 = 0 5*x(5*x - 2) - 2* (5*x - 2) = 0 (5*x - 2)*(5*x - 2) = 0 or (5*x - 2)^2 = 0 5*x = 2 x = 2/5 or 0.4
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The factorization of 25x2 + 40x + 16 is (5x+4)(5x+4).
6x + 12x + 2x = 80 20x = 80 x = 4
-4 plus 4 equals zero.
4x = 20 x = 5 (divide both sides by 4)
(6, -4)