how do I solve this. Im having a brain cramp. The Square roots are messing with me.

(2x+20)(2x+40)=700^2

Thanks

Question

how do I solve this. Im having a brain cramp. The Square roots are messing with me.

(2x+20)(2x+40)=700^2

Thanks

marissalovescats · Answer

You're trying to solve for x correct?

marissalovescats · Answer

Well first off, you want to FOIL your 2 binomials. Do you know how to FOIL?

jdoe0001 · Answer

ohh no, is the cat lover!

marissalovescats · Answer

....

jdoe0001 · Answer

lame humor I gather heheh

jdoe0001 · Answer

if you expand this -> (2x+20)(2x+40)  <-- it'll just give you a constant value
which in the equation should EQUATE the other side

marissalovescats · Answer

But it doesn't because when you foil that, you get an x^2 and an x. But I'm wondering... If you have to deal with square roots or if you can just divide by x and the rule is supposed to be that if there is a division bar it acts as subtraction for powers and make is just x.. But I'm not sure if you can apply that rule here.

anonymous · Answer

I may have set up the equation wrong

anonymous · Answer

It a word problem

marissalovescats · Answer

That makes WAY more sense.

anonymous · Answer

I could type it out?

marissalovescats · Answer

Because unless I can do the rule im thinking of... Your answer is a really weird fraction.

marissalovescats · Answer

Sure, type away I'll see if I can't help.

anonymous · Answer

Dan plans on building a uniform walkway around a rectangular flower bed that is 20m by 40m. There is enough material to make a walkway that has a total area of 70m^2.. What is the width of the walkway|dw:1373134983959:dw|