3 years ago

V2+4v-21=0 (solve by factoring)

Mathematics

2 answers:

Genrish500 [490]3 years ago

7 0

Answer:

The answer is (v - 3)(v + 7).

Step-by-step explanation:

First, you have to elaborate it :

v² + 4v - 21 = 0

v² - 3v + 7v - 21 = 0

Next, you have to collect like terms :

v(v - 3) + 7(v - 3) = 0

(v - 3)(v + 7) = 0

frozen [14]3 years ago

6 0

Answer: (v + 7)(v -3)

Step-by-step explanation:

(v +7)(v -3)

v x v = v^2

v x -3 = -3v

7 x v = 7v

7 x -3 = -21

v^2 -3v +7v -21 = v^2 +4v -21 = 0

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V2+4v-21=0 (solve by factoring)​

V2+4v-21=0 (solve by factoring)