Question

solve by formula method. 7x² + 15x + 8 = 0​

Answer 1

Answer:

-8/7 or -1

Step-by-step explanation:

7x²+15x+8=0

7x²+7x+8x+8=0

(7x²+7x)+(8x+8)=0

7x(x+1)+8(x+1)=0

(7x+8)(x+1)=0

7x+8=0 .or x+1=0

7x=-8. [x=-1]

[x=-8/7]