Question

Solve. x2 – 10x = 5? i know it's easy but i forgot -_-

Answer 1

You want to combine these terms into a quadratic equation, factor out, and then find x :)
Solve. x2 – 10x = 5
subtract 5 from both sides:
x2 - 10x - 5 = 0
Now, find two numbers that when added equal -10 and when multiplied equal -5. Can you think of any?

Answer 2

again, you can use the same methods that were explained to you by @helder_edwin in this question: http://openstudy.com/updates/501452c0e4b0fa246730cbe4

Answer 3

In that case, what asnaseer linked applies. Good luck ~

Answer 4

dang it asnaseer! ur messing up my learning :{

Answer 5

how? which parts do you still not understand?

Answer 6

where wach left off..its hard for me to review stuff...

Answer 7

look at what helder_edwin showed you in the previous question and at least make an attempt at answering this question using those methods.
start one step at a time and I'll guide you if you are going wrong.

Answer 8

There are actually multiple ways to solve that equation. You can plug it into the formula given to you earlier or factor/complete the square. The other method is better for equations wherein the answer isn't 'whole'.

Answer 9

i tried solving it and i got..5+or-sqrt15. am i correct?

Answer 10

almost

Answer 11

if you show your individual steps then I can show you where you may have made a mistake

Answer 12

@wach yes there are multiple ways of solving these types of equations, but I /think/ rayford has been taught to use the quadratic equation - correct me if I'm wrong rayford.

Answer 13

yes u are right..

Answer 14

remember the standard form of a quadratic equation is:\[ax^2+bx+c=0\]so your first step should be to identify the values for a, b and c.
what do you think they are for this question?

Answer 15

x2 +10x+5?

Answer 16

you don't have the signs correct - look at what wach wrote above.

Answer 17

x2-10x+5

Answer 18

are you looking at what wach wrote above? you still don't have all the signs correct.

Answer 19

Hint: Add 25 to both sides

Answer 20

x^2 - 10x + 25 = 5 + 25

Answer 21

thanks hero!