Question

Solve The Quadratic Equation

7x²+15x+8=0​

Answer 1

Answer:

7xsquare+7x+8x+8=0

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

x=-8/7,-1

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Answer 2

Answer:

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According to the Quadratic Formula, x , the solution for Ax2+Bx+C = 0 , where A, B and C are numbers, often called coefficients, is given by :

- B ± √ B2-4AC

x = ————————

2A

In our case, A = 7

B = -15

C = 8

Accordingly, B2 - 4AC =

225 - 224 =

1

Applying the quadratic formula :

15 ± √ 1

x = —————

14

So now we are looking at:

x = ( 15 ± 1) / 14

Two real solutions:

x =(15+√1)/14= 1.143

or:

x =(15-√1)/14= 1.000