Hay varios metodos formula general, completando cuadrados, etc
vamos con la formula general : x = ( - b + - √b ^ 2 - 4ac ) / 2a
3x² - 5x + 2 = 0
a = 3, b = - 5, c = 2
x = ( - ( - 5) + - √( - 5) ^ 2 - 4(3)(2) ) / 2(3)
x = (5 + - √25 - 24) / 6
x = (5 + - √1) / 6
x1 = 5 + 1 / 6 = 1
x2 = 5 - 1 / 6 = 2 / 3
4x² + 3x - 22 =
a = 4, b = 3, c = - 22
x = ( - (3) + - √(3) ^ 2 - 4(4)( - 22) ) / 2(4)
x = ( - 3 + - √361) / 8
x1 = - 3 + 13 / 8 = 2
x2 = - 3 - 13 / 8 = - 2
x² + 11x + 24 = 0
a = 1, b = 11, c = 24
x = ( - (11) + - √(11) ^ 2 - 4(1)(24) ) / 2(1)
x = - 11 + - √25 / 2
x1 = - 11 + 5 / 2 = - 3
x2 = - 11 - 5 / 2 = - 8
x² - 16x + 63 = 0
a = 1, b = - 16, c = 63
x = ( - ( - 16) + - √( - 16) ^ 2 - 4(1)(63) ) / 2(1)
x = 16 + - √4 / 2
x1 = 16 + 2 / 2 = 9
x2 = 16 - 2 / 2 = 7
9x² - 12x + 4 =
a = 9, b = - 12, c = 4
x = ( - ( - 12) + - √( - 12) ^ 2 - 4(9)(4) ) / 2(9)
x = 12 + - √0 / 18
x1 = 12 + 0 / 18 = 2 / 3
x2 = 12 - 0 / 18 = 2 / 3.