Answer :
100x² + 180x + 81
100x² + 90x + 90x + 81
(10x + 9)(10x + 9)
or
100x² + 180x + 81 = 0
x = -180 +/- √(180² - 4(100)(81))
2(100)
x = -180 +/- √(32400 - 32400)
200
x = -180 +/- √(0)
200
x = -180 +/- 0
200
x = -180
200
x = -9/10
100x² + 90x + 90x + 81
(10x + 9)(10x + 9)
or
100x² + 180x + 81 = 0
x = -180 +/- √(180² - 4(100)(81))
2(100)
x = -180 +/- √(32400 - 32400)
200
x = -180 +/- √(0)
200
x = -180 +/- 0
200
x = -180
200
x = -9/10
