Question

procedimiento de 19x2-10x2-18x-18=10x2-9

Answer 1

19x² - 10x² - 18x = 10x² - 9

-x² - 18x + 9 = 0

x² + 18x - 9 = 0

a = 1
b = 18
c = -9

x = [ -b ± √(b²-4ac) ] ÷ 2a

x = [ -18 ± √(18²-4(1)(-9) ) ] ÷ 2(1)

x = -18/2 ± (6/2)√10

x = -9 ± 3√10

x = -8 + 3√10 ó x = -8 - 3√10