Friday

September 19, 2014

September 19, 2014

Posted by **Sabrina** on Friday, September 24, 2010 at 9:19pm.

x^2-x=-7

This is what I have got so far and I do not think this is right:

x=1(-1)√-1^2-4(1)(7)/2(1)

x=1√1-4(7)/2

x=1√-21/2

x=1-21/2

and here I am lost!

Use rational exponents to simplify. √(5&x^10 )

Simplify by taking roots of the numerator and the denominator. Assume that all expressions under radicals represent positive numbers. ∛(〖125x〗^11/y^3 )

Multiply. (-2t)^2 (〖3t〗^7 )

Divide and simplify. (3y-6)/14(y-2)/4y

- Math SCREAMING for HELP -
**Reiny**, Friday, September 24, 2010 at 9:46pmchange it to the standard form first

x^2 - x + 7 = 0

a=1, b=-1, c = 7

x = (1 √(1 - 4(1)(7))/2

= (1 √-27)/2

Your answer is an imaginary number or called a complex number, you could rewrite is as

x = (1 3√3 i)/2

- Math SCREAMING for HELP -
**bobpursley**, Friday, September 24, 2010 at 9:47pmx^2-x+7=0

x= (1+-sqrt(1-28))/2=1/2 +- 1/2 sqrt-21

and sqrt-21= isqrt21

2) I dont understand the others.

- Math SCREAMING for HELP -
**Sabrina**, Friday, September 24, 2010 at 10:03pmOkay so do I write the answer as the solution set is:(1 } 33 i)/2 , 0

**Answer this Question**

**Related Questions**

math,algebra,correction - x = (-5 +/-85)/10 do you mean -0.5 or -5 is this ...

algebra - Solve the quadratic equation: 2x(squared)+6x+12=0 I know you have to ...

Math - I need someone to check my homework answers. I don't really know this ...

College Math - r^2+10r-23=0 I used the quadratic formula and I got a -5+2√...

Math - Find an equation of the line that bisects the obtuse angles formed by the...

Algebra 2 - Use the distance formula to find the equation of a parabola. Focus...

Math ,help - how can i simplify this more its for the following problem: Problem...

Math - Use the quadratic formula to solve each of the following quadratic ...

math,algebra - can someone help me out factor out this 0=16t^2-122t+180 i have ...

Math - Can you help me check if I'm doing this correctly or not? I'm solving ...