a^2 - 2ab - b^2
the - 2ab is really throwing me off
how would i factor this?
2009-07-03 5:07 am
回答 (7)
2009-07-03 11:41 am
✔ 最佳答案
a² - 2ab - b² = 0a² - ab = b² + (- b)²
a² - ab = b² + b²
(a - b)² = 2b²
a - b = +/- 1.4142135b
= a - b - 1.4142135b, = a - 2.4142135b
= a - b + 1.4142135b, = a + 0.4142135b
Answer: (a - 2.4142135b)(a + 0.4142135b)
Proof:
= (a - 2.4142135b)(a + 0.4142135b)
= a² + 0.4142135ab - 2.4142135ab - b²
= a² - 2ab - b²
2009-07-03 12:15 pm
( b - a )( b - a )
b^2-ab-ab+a^2
a^2-2ab-b^2
b^2-ab-ab+a^2
a^2-2ab-b^2
2009-07-03 1:16 pm
a^2 - 2ab - b^2
(cannot be factored)
(cannot be factored)
2009-07-03 12:24 pm
No factors
good luck
good luck
2009-07-03 12:15 pm
=(a-b)^2-2b^2=
=(a-b-b\/'2')(a-b+b\/'2)
=(a-b-b\/'2')(a-b+b\/'2)
2009-07-03 12:12 pm
that is not factorable
2009-07-03 12:12 pm
hmm, that is easy but I can't remember. Do you subtract 2ab from both sides?
收錄日期: 2021-05-01 12:33:21
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