wonderwoman7 wonderwoman7
  • 03-03-2018
  • Mathematics
contestada

I don’t know how to solve the equation

I dont know how to solve the equation class=

Respuesta :

MarkV
MarkV MarkV
  • 03-03-2018
To solve this equation we have to factor.
We are looking for 2 numbers with a sum of -3, and multiplied they have to be -28. These numbers are -7 and 4.

So:
[tex] {x}^{2} - 3x - 28 = 0[/tex]
[tex](x - 7)(x + 4) = 0[/tex]
[tex]x - 7 = 0 \: \: \: \: x + 4 = 0[/tex]
[tex]x = 7 \: \: \: \: x = - 4[/tex]

Answer Link

Otras preguntas

What is one defining feature of a prokaryotic cell? nucleus flagella ribosomes nucleoid
Write a description of a place that would be ‘paradise' to you. Your description should contain the place, historical time, mood, atmosphere, and tone./
2. Which of the following describes the effort arm? The side of the lever on which the force is exerted, The end of the lever that moves the load. The weight or
suppose that $\star(n) = \left\{n - 2, n + 2, 2n, \frac {n}{2}\right\}$. for example, $\star(6) = \{3,4,8,12\}$. for how many distinct integers $n$ does $\star(
just need the answer. in degrees thanks;) 1. QR = 36 ; PR = 45 ; PQ = 21, Sin _?. = 21 / 45 2. QR = 16 ; PR = 2 ; PQ = 8, tan _?_ = 8/16 3. QR = 15; PR = 28 ; P
n over 5 is greater than or equal to 11
What is the value of x if 4(6x - x) = -10 ?
Factorise the expression below where a is larger than 1:16x^2-8x+1
You better if you stop worrying
This is supposed to be music...