v^2-2v-15 factor the trinomial?
回答 (4)
2010-04-13 11:20 am
✔ 最佳答案
v^ 2 -2v - 15= v ^2 -5v + 3v - 15
= v ( v - 5 ) + 3 (v - 5)
= ( v + 3 ) ( v - 5 )
2010-04-13 7:38 pm
v² - 2v - 15 = 0
v² - v = 15 + (- 1)²
v² - v = 15 + 1
(v - 1)² = 16
v - 1 = ± 4
= v - 1 - 4, = v - 5
= v - 1 + 4, = v + 3
Answer: (v - 5)(v + 3)
v² - v = 15 + (- 1)²
v² - v = 15 + 1
(v - 1)² = 16
v - 1 = ± 4
= v - 1 - 4, = v - 5
= v - 1 + 4, = v + 3
Answer: (v - 5)(v + 3)
2010-04-13 7:23 pm
v^2 - 2v - 15
= v^2 + 3v - 5v - 15
= (v^2 + 3v) - (5v + 15)
= v(v + 3) - 5(v + 3)
= (v + 3)(v - 5)
= v^2 + 3v - 5v - 15
= (v^2 + 3v) - (5v + 15)
= v(v + 3) - 5(v + 3)
= (v + 3)(v - 5)
2010-04-13 6:27 pm
v^2-2v-15
=(v-5)(v+3) answer//
=(v-5)(v+3) answer//
收錄日期: 2021-05-01 13:03:03
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