Factor the polynomial completely?

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I need help how can i factor this problem

81y2 - 72y + 16

2007-06-22 01:39:07 · 3 answers · asked by arcenia256 1 in Science & Mathematics ➔ Mathematics

= (9y)^2 -2 (9y)(4) + 4^2 = (9y-4)^2

2007-06-22 01:43:02 · answer #1 · answered by Mein Hoon Na 7 · 0⤊ 0⤋

81y^2 - 72y + 16 = (9y - 4)(9y -4)
= (3y -2)(3y +2)(3y -2)(3y + 2)
= (3y-2)^2*(3y+2)^2

2007-06-22 08:48:22 · answer #2 · answered by awcostello2003 1 · 0⤊ 0⤋

81yÂ² - 72y + 16
= (9y - 4).(9y - 4)
= (3y - 2).(3y + 2).(3y - 2).(3y + 2)
= (3y - 2)Â².(3y + 2)Â²

2007-06-25 15:00:20 · answer #3 · answered by Como 7 · 0⤊ 0⤋