Question

In this equation 4(x^2 – 8x) = 4(13), what would the coefficient of x^2 be in this case? Would this be correct 4x1=4? If not, what would the correct answer be?

Answer 1

What is 4(13)?

Answer 2

This is what I am trying to solve for - x2 – 2x – 13 = 0
- x2 - 2x = 13
step (a): move the constant term to right side of the equation

4x2- 8x = 52

step (b): multiply each term of the equation by 4 times the coefficient of x2 –
in this case 1x4 = 4 (trying to solve this case what is the coefficient of x^2?)

4 x2- 8x + 4 = 56
step (c): square the coefficient of original x term and add it to both sides of equation – in this case -2^2 = -4
(trying to solve this case what is the coefficient of 2x^2?)

Answer 3

In google type
"quadratic equation online"

When you see list of results click on:

mathwarehousecom/quadratic/quadratic-formula-calculator.php

Type your coefficients and click option Solve

Answer 4

To solve
4(x^2 – 8x) = 4(13)
I would proceed to divide each side by 4 to get
x²-8x-13=0
Since there are no rational factors here, we would use the quadratic formula:
x=(-b±√(b²-4ac))/2a
=(8±√((-8)²-4*1*(-13)))/2
=4±√(29)

Answer 5

X2-8X+23=0