evaluate the expression b²-4ac given the following values of a,b,&c
a=-4 b=-4 c=5
a=2 b=5 c=-4
a=5 b=1 c=-2
a=1 b=5 c=2
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evaluate the expression b²-4ac given the following values of a,b,&c
a=-4 b=-4 c=5
a=2 b=5 c=-4
a=5 b=1 c=-2
a=1 b=5 c=2
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Answer:
1. b²-4ac
(-4)² - 4(-4) (5)
16 - 4(-20)
16+80
96
2. b²-4ac
(5)² - 4 (2)(-4)
25 - 4 (-8)
25 + 32
57
3. b²-4ac
1² - 4 (5)(-2)
1 - 4 (-10)
1 + 40
41
4. b²-4ac
(5)² - 4 (1)(2)
25- 4(2)
25 - 8
17