Direction: Evaluate the expression b2 - 4ac given the following values of a, b, c.
1. a = 6 b = -2 c = -3
2. a = 1 b = 5 c = 2
3. a = 5 b = 1 c = 2
4. a = -4 b = -4 c = 5
5. a = 2 b = 5 c = -4
help meh
1. a = 6 b = -2 c = -3
2. a = 1 b = 5 c = 2
3. a = 5 b = 1 c = 2
4. a = -4 b = -4 c = 5
5. a = 2 b = 5 c = -4
help meh
Answers & Comments
Answer:
1. 76
2. 2
3. -39
4. 88
5. 42
Step-by-step explanation:
1. B²-4ac
(-2)²-4(6)(-3)
4-(-72)
=76
2. (5)²-4(1)(2)
10-8
=2
3. (1)²-4(5)(2)
1-40
= -39
4. (-4)²-4(-4)(5)
8-(-80)
=88
5. (5)²-4 (2)(-4)
10-(-32)
=42
CORRECT ME IF I'M WRONG ;)
Step-by-step explanation:
1. b^2 - 4ac
= (-2)^2 - 4(6)(-3)
= 4 + 72
= 76
2. b^2 - 4ac
= (5)^2 - 4(1)(2)
= 25 - 8
= 17
3. b^2 - 4ac
= (1)^2 - 4(5)(2)
= 1 - 40
= -39
4. b^2 - 4ac
= (-4)^2 - 4(-4)(5)
= 16 + 80
= -64
5. b^2 - 4ac
= (5)^2 - 4(2)(-4)
= 25 +32
= 57