algebra 2
posted by Krystal .
How would you solve 3x^2+8x91=0 and 9r^2+4r+2=0 using the quadratic formula?

algebra 2 
Steve
the same way you solve any quadratic. The first is:
x = [8±√(8^24(3)(91))]/(2*3)
= (8±√1156)/6
= (8±34)/6
= 7,13/3
solve the other in like wise.
Respond to this Question
Similar Questions

8th Grade Algebra
You know how to solve quadratic equations using algebra, graphs and the quadratic formula. Sometimes one method of solving is more convenient than another method. Describe how you would solve each equation. Give reasons for you answers. … 
algebra II
I'm quite clueless as to how to solve this. I know the quadratic equation but am not sure how to get this equation into the format to plug in to the quadratic... Solve the quadratic equation using the formula [1/(1+x)][1/(3x)]=(6/35) … 
Algebra
can show me how to do this with out just squaring 3x^(1/2)  x  6 = 0 how do i do this and solve for x with out just squareing and using quadratic formula. I was never taught the proof of the quadratic formula and would like to know … 
College Math II
Solve by using the quadratic formula. x^2 + 6x + 6 = 0 I am having problems using the quadratic formula to get the right answer. Can someone show me the steps that I use? 
algebra
Solve this quadratic equation using the quadratic formula. x^2 + 8x  5 = 0 
algebra
which quadratic formula would be used to solve the following quadratic equation? 
Algebra
Explain how to solve a quadratic equation using the quadratic formula. 
College Algebra
Solve the following equation in the complex number system x^4+x^3+4x^2+10x60=0 College Algebra  Reiny, Monday, January 2, 2012 at 11:49pm hint x = 2 and x = 3 are roots so either do long division by x2 and x+3 to get a quadratic … 
Math
Solve for the zeros of the function using the quadratic formula. 3x^2=4x+6 I know what the quadratic formula is but when I put it into the formula I keep getting an error on the graphing calculator. 
Algebra 1
How do I solve this quadratic equation using the quadratic formula "8a(squared)a+2=0"