Question

find the value of b2-4ac , if a=4. b=1. c= -5​

Answer 1

Answer:

81

Step-by-step explanation:

b²-4ac=

${1}^{2} - 4 \times 4 \times - 5$

Answer 2

Answer:

b²-4ac = 81

Step-by-step explanation:

b²- 4ac = 1² - 4 × 4 × -5

= 1 - 16 × -5

= 1 + 80

= 81