rani Group Title 2w+3squareroot of w=14 one year ago one year ago

1. rani Group Title

$2w+3\sqrt{w}=14$

2. rani Group Title

solve by substitution

3. liza2 Group Title

w= 4 Don't know how to solve it by substitution

4. rani Group Title

i got 4 also

5. rani Group Title

what did you use?

6. rani Group Title

i got w=4 and w = -7/2

7. liza2 Group Title

Just looked at the problem & guessed, then checked my math.

8. rani Group Title

lol wtf, good guess

9. liza2 Group Title

well, if you look at it, you know odds are w has to be a number that has an integer square root. And it has to be pretty low. So, 4 was the first number that came to mind, because 9 is the next square, and it's already too high.