Question

3х-х во второй +10=0

Answer 1

Объяснение:

-х²+3х+10=0

умножаем всё на -1

х²-3х-10=0

D=9+40=49=7²

x1,2=(3±7)/2

x1=5

x2=-2

Answer 2

To solve the equation, we need to simplify and then solve for the value of x. Let's go step by step:

1. Combine like terms on the left side of the equation: 3x - x^2 + 10 = 0

2. Rearrange the equation in standard quadratic form (ax^2 + bx + c = 0): -x^2 + 3x + 10 = 0

3. To solve the quadratic equation, you can use the quadratic formula: The quadratic formula is given by: x = (-b ± √(b^2 - 4ac)) / 2a

   In our equation, a = -1, b = 3, and c = 10. Plug these values into the formula:

   x = (-(3) ± √(3^2 - 4(-1)(10))) / 2(-1) x = (-3 ± √(9 + 40)) / -2 x = (-3 ± √49) / -2 x = (-3 ± 7) / -2

4. Now, find the two possible solutions for x by considering both the plus and minus signs: a) x = (-3 + 7) / -2 x = 4 / -2 x = -2

   b) x = (-3 - 7) / -2 x = -10 / -2 x = 5

So, the equation has two solutions: x = -2 and x = 5.