100 Things Astros Fans Should Know & Do Before They Die (World Series Edition) (100 Things

100 Things Astros Fans Should Know & Do Before They Die (World Series Edition) (100 Things

Matematika Tentukan akar akar persamaan kuadrat dgn cara memfaktorkan :
2x² + x -15 = 0

kak bantuu :(​

Tentukan akar akar persamaan kuadrat dgn cara memfaktorkan :
2x² + x -15 = 0

kak bantuu :(​

2x² + x - 5 = 0

» 2x² - 5x + 6x - 15 = 0

» x (2x - 5) + 3 (2x - 5) = 0

» (2x - 5) (x + 3) = 0

» 2x - 5 = 0 atau x + 3 = 0

» 2x - 5 = 0

» 2x = 5

» x = 5/2

» x = 5/2 atau x = -3

Penjelasan dengan langkah-langkah:

2x² + x - 15 = 0

2x² + 6x - 5x - 15 = 0

2x(x + 3) - 5(x + 3) = 0

(2x - 5)(x + 3) = 0

2x - 5 = 0 atau x + 3 = 0

2x = 0 + 5 atau x = 0 - 3

2x = 5 atau x = -3

x = 5/2 atau x = -3

HP{-3, 5/2}

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