Solve using the quadratic formula. Write answers as an exact value and as a decimal rounded to the nearest hundredth. 4r2 + 8r + 1 = 0

dec form: -0.13

Step-by-step explanation:

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐