Question

9.14. 1) 7x² + x = 8;3)-2x² + 7x - 3;24​

Answer 1

Ответ:

1) 7х²+х-8=0

Д= 1+224= 225

х1= -1-15/14= -16/14

х2= -1+15/14= 1

Объяснение:

вроде так

Answer 2

To solve the equations, let's go through them one by one:

1. 7x² + x = 8

To solve this quadratic equation, we'll set it equal to zero and then use factoring or the quadratic formula:

7x² + x - 8 = 0

Now, we can factor this quadratic equation:

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

Setting each factor equal to zero, we have:

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

Solving each equation separately:

For 7x - 8 = 0: 7x = 8 x = 8/7

For x + 1 = 0: x = -1

So the solutions to the equation 7x² + x = 8 are x = 8/7 and x = -1.

2. -2x² + 7x - 3 = 0

This is another quadratic equation. We can factor it or use the quadratic formula:

-2x² + 7x - 3 = 0

We can factor it as follows:

(-2x + 1)(x - 3) = 0

Setting each factor equal to zero:

-2x + 1 = 0 or x - 3 = 0

Solving each equation separately:

For -2x + 1 = 0: -2x = -1 x = -1/(-2) x = 1/2

For x - 3 = 0: x = 3

So the solutions to the equation -2x² + 7x - 3 = 0 are x = 1/2 and x = 3.

I'm not sure what you meant by "24" at the end of the equation, so I didn't include it in the calculations. If you provide more information or clarify your question, I'll be happy to assist you further.