Akar-akar persamaan kuadrat 2 + 7x + m = 0 adalah a dan b. Jika b = 2a - 2 dan a,b>0, maka nilai m a.... Question from @Firman24

August 2018 1 31 Report

Akar-akar persamaan kuadrat 2 $x^{2}$ + 7x + m = 0 adalah a dan b. Jika b = 2a - 2 dan a,b>0, maka nilai m adalah...

katakganteng A + B = -b/a
a + 2a - 2 = -7/2
3a - 2 = -7/2
6a - 4 = -7
6a = -3
a = -1/2

b = 2(-1/2)-2 = -3

A . B = c/a
-1/2 . -3 = m/2
3/2 = m /2
3 = m

sehingga,m= 3

2 votes Thanks 1

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Firman24 August 2018 | 0 Replies

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