Homework Help: math

Posted by bob on Saturday, March 10, 2012 at 3:27pm.

(4.35E-2 - x)(7.56E-2 -x )
============================
(0.324 + 2x)2

Rearrange to get an expression of the form ax2 + bx + c = 0 and use the quadratic formula (solve for x. This gives:
x = 1.05E-2, 0.143

basically i understand they use the quadratic equation but how did they change that crazy fraction into the quadratic formula?

math - Damon, Saturday, March 10, 2012 at 5:40pm
If that fraction = 0 (you left that out) then the denominator is not part of the problem unless it is zero.

32.88 E-4 - 11.91 E-2 x + x^2 = 0

x = [ 11.91E-2 +/- sqrt(142 E-4 - 132 E-4) ] / 2

= [ .119 +/- E-2 sqrt(10) ]/2

= [.119 +/- .031 ]/2

= .075 or -.044
math - trevor, Tuesday, March 13, 2012 at 12:37pm
for the following population of n=9 scores below.
11 12 16 15 19 16 13 17 11
range........
variance standard deviation s:

Answer this Question

Related Questions

math - what would it be if you took 324.76 and tryed to make it notation and in ...
MaTH - Rearrange the terms of the equations fo form Ax + By = C I really get ...
math/ calculus - find f''(x) if f(x)= 3(ãx2-2x+1)
MAATH - Rearrange the terms of the equations fo form Ax + By = C I really get ...
math (pre calc) - 4cot^2x-4/tanx+cosxsecx write expression in factored form as ...
math - how do you rearrange the equation 2x+y=6 and the equation -3x+4y+5=0 into...
Math(Please help) - 1) An expression that occurs in calculus in given. Reduce ...
Math(Please help) - 1) An expression that occurs in calculus in given. Reduce ...
Math - Use the quadratic formula to solve each of the following quadratic ...
Algebra - Quadratics (ZERO PRODUCT PROPERTY) - Can the Property of this: ax2 + ...

For Further Reading

First Name:
School Subject:
Answer: