Question

solve the following equation by using quadratic formula 2 b square - 7 b + 5 = 20​

Answer 1

Answer:

2b-7b=15

-5b=15

b=-3

Step-by-step explanation:

hope it hepps

Answer 2

Answer:

-3/2, or 5

Step-by-step explanation:

2b²- 7b+ 5 = 20

2b²-7b +5-20 = 0

2b²- 7b -15 = 0

2b² + 3b - 10b -15=0

(2b²+3b ) -( 10b + 15 ) = 0

b(2b+3)-5(2b+3) =0

2b+3 =0 or b-5

b = -3/2 or b= 5