Question

Resuelve por favor....
1. x²-3x-18=
2. x²+x-20=
3. x²+3x-10=
4. x²-13x-30=​

Answer 1

1. x²-3x-18=

$(x + 3)(x - 6)$

2. x²+x-20=

$(x - 4)(x + 5)$

3. x²+3x-10=

$(x - 2)(x + 5)$

4. x²-13x-30=

$(x + 2)(x - 15)$

Answer 2

Respuesta:

1 ) x = 18

2 ) x = 20

3 ) x = 2

4 ) x = - 2.72722

Explicación paso a paso:

1 ) f ( x ) x ^2 = 2x - 3x - 18 = 0

x = 0 + 18

x = 18

2 ) f  x ) x ^ 2 = 2x - x - 20 = 0

x = 20

3 ) f ( x ) x ^2 = 2x + 3x - 10 =0

5x = 0 +10

x = 10 / 5 = 2

4 ) f ( x ) x ^2 = 2x - 13x = 0 + 30

- 11x = 0+ 30 = x = 30 / - 11 = - 2.72722