Question

-х вквадрате-5х+14=0 решение

Answer 1

Ответ: дискриминант 25+4*14=25+56=81. Корни х1=(5+9)/(-2)=-7, х2=(5-9)/(-2)=2.

Объяснение:

Answer 2

-х²-5х+14=0

D=(-5)²-4•(-1)•14=25+56=81

х1=(-(-5)+корень с 81):2•(-1)=(5+9):2=7

х2=(-(-5)-корень с 81):2•(-1)=(5-9):2=-2

Answer 3

To solve the quadratic equation -x^2 - 5x + 14 = 0, we can use the quadratic formula. The quadratic formula states that for any equation of the form ax^2 + bx + c = 0, the solutions for x are given by:

x = (-b ± √(b^2 - 4ac)) / 2a

In our case, a = -1, b = -5, and c = 14. Substituting these values into the quadratic formula, we get:

x = (5 ± √((-5)^2 - 4 * (-1) * 14)) / 2 * (-1) x = (5 ± √(25 + 56)) / -2 x = (5 ± √81) / -2 x = (5 ± 9) / -2

Now, we have two possible solutions:

1. x = (5 + 9) / -2 x = 14 / -2 x = -7

2. x = (5 - 9) / -2 x = -4 / -2 x = 2

So, the solutions to the quadratic equation are x = -7 and x = 2.