》b²-4ac
1.) 6x² - 2x - 3 = 0
Discriminant:
b² - 4ac
= (-2)² - 4(6)(-3)
= 4 - (-72)
= 74
2.) -2x² - x - 1 = 0
= (-1)² - 4(-2)(-1)
= 1 - 8
= -7
3.) 5x² + x - 2 = 0
= (1)² - 4(5)(-2)
= 1 - (-40)
= 41
4.) x² + 5x + 2 = 0
= (5)² - 4(1)(2)
= 25 - 8
= 17
5.) 2x² + 5x + 4 = 0
= (5)² - 4(2)(4)
= 25 - 16
= 9
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Verified answer
DISCRIMINANT
》b²-4ac
ANSWERS:
1.) 6x² - 2x - 3 = 0
Discriminant:
b² - 4ac
= (-2)² - 4(6)(-3)
= 4 - (-72)
= 74
2.) -2x² - x - 1 = 0
Discriminant:
b² - 4ac
= (-1)² - 4(-2)(-1)
= 1 - 8
= -7
3.) 5x² + x - 2 = 0
Discriminant:
b² - 4ac
= (1)² - 4(5)(-2)
= 1 - (-40)
= 41
4.) x² + 5x + 2 = 0
Discriminant:
b² - 4ac
= (5)² - 4(1)(2)
= 25 - 8
= 17
5.) 2x² + 5x + 4 = 0
Discriminant:
b² - 4ac
= (5)² - 4(2)(4)
= 25 - 16
= 9