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(4x+1)(2x+1) = 0
4x+1 = 0
x = -1/4
2x+1 = 0
x= -1/2
b) 2x² - x - 10 = 0
(2x-5)(x+2) = 0
2x-5 = 0
x = 5/2
x+2 = 0
x = -2
c) x² - 4x + 3 = 0
(x-3)(x+3) = 0
x-3 = 0
x = 3
x+3 = 0
x = -3
d) x² + 4x + 4 = 0
(x+2)² = 0
x+2 = 0
x = -2 con multiplicidad 2
e) x² + 13x + 36 = 0
(x+4)(x+9) = 0
x+4 = 0
x = -4
x-9 = 0
x = 9