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Answered

Evaluate the expression b² - 4ac given the following values of a,b and c.

1. a=1 , b=5 ,c=4
2.a=4, b= 4 ,c=1
3. a= 1, b=-2,c=-2
4.a=3 , b=0 ,c=5
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Answer:

1. a=1 , b=5 ,c=4

> (5)²-4(1)(4)

> 25-16

> 9

2.a=4, b= 4 ,c=1

> (4)²-4(4)(1)

> 16-16

> 0

3. a= 1, b=-2,c=-2

> (-2)²-4(1)(-2)

> 4+8

> 12

4.a=3 , b=0 ,c=5

> (0)²-4(3)(5)

> 0-60

> -60

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