SOLUTION: Solve by using the quadratic formula. x^2 = –7x + 12

Algebra.Com
Question 83827: Solve by using the quadratic formula.
x^2 = –7x + 12

Found 2 solutions by josmiceli, Earlsdon:
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!


This is now in the form


a = 1
b = 7
c = -12


The answers are:

and

You can check these answers by substituting for x in the
equation, but it's tough algebra. Instead, you can
evaluate and find the roots
and



Not exact due to rounding-off errors,
but you get the idea

Answer by Earlsdon(6294)   (Show Source): You can put this solution on YOUR website!
Solve using the quadratic formula:
It would help if you were to put your equation into the standard form for quadratic equations:
Add 7x to both sides.
Now subtract 12 from both sides.
So now you can see that a = 1, b = 7 and c = -12.
Applying the quadratic formula, you get:
Simplify this.


The solutions are:
and

RELATED QUESTIONS

Solve by using the quadratic formula x^2=-7x-3 (answered by checkley71)
x^2-7x+11=0 solve by using quadratic... (answered by jim_thompson5910)
Solve using the quadratic formula: x^2 - 3x = 7x -... (answered by Fombitz)
Solve using the quadratic formula: x^2 – 3x = 7x – 2 (answered by jim_thompson5910)
Solve using the quadratic formula: x^2 – 3x = 7x – 2 (answered by nerdybill)
Solve using the quadratic formula:... (answered by checkley71)
Solve using the quadratic formula: x^2 – 7x – 1 = -7 (answered by jim_thompson5910)
Solve the problem equation for x by using the quadratic formula... (answered by drk)
Solve by using the quadratic formula x^2= 3x + 12... (answered by 1980.vikas)