q(2q+3) +20=2q(q-3)
is the answer 20/9?
2007-06-09 04:16:26 · 11 answers · asked by Okay.... 3 in Science & Mathematics ➔ Mathematics
2q^2 + 3q + 20 = 2q^2 - 6q
3q + 20 = -6q
9q + 20 = 0
9q = -20
q = -20/9
you were close, you just forgot the negative
2007-06-09 04:24:37 · answer #1 · answered by hawkeye3772 4 · 1⤊ 0⤋
q(2q+3) +20 = 2q(q-3)
2q² + 3q + 20 = 2q² - 6q
group all the q's to the left side,
2q² - 2q² + 3q + 6q = -20
9q = -20
q = -20/9
2007-06-09 04:32:12 · answer #2 · answered by jurassicko 4 · 0⤊ 0⤋
expand to this. . .
2q^2 + 3q + 20 = 2q^2 - 6q
cancel the 2q^2 on each side and add 6q to both sides and subtract 20 from both sides
9q = -20
q = -20/9
2007-06-09 04:23:16 · answer #3 · answered by Tony D 1 · 0⤊ 0⤋
q(2q + 3) + 20 = 2q(q - 3)
2q² + 3q + 20 = 2q² - 6q
2q² + 3q + 20 - 2q² = 2q² - 6q - 2q²
3q + 20 = - 6q
3q + 20 + 6q = - 6q + 6q
9q + 20 = 0
9q + 20 - 20 = 0 - 20
9q = - 20
9q / 9 = - 20 / 9
q = - 20 / 9
- - - - - - - - - -s-
2007-06-09 04:30:09 · answer #4 · answered by SAMUEL D 7 · 0⤊ 0⤋
It's -2/9
2007-06-09 04:48:54 · answer #5 · answered by Thomas V 1 · 0⤊ 0⤋
q(2q+3) +20=2q(q-3)
2q^2+3q+20=2q^2-6q
3q+6q=-20
9q=-20
q=- 20/9
2007-06-09 04:25:25 · answer #6 · answered by Anonymous · 0⤊ 0⤋
let me check...
q(2q+3)+20=2q(q-3)
to solve this equation, you need to do the distributive property which is like this...
q times 2q plus q times 3 plus 20 equals 2q times q plus 2q times negative 3. here it is...
2 2
2q +3q+20=2q -6q
2 2
-2q -2q
3q+20=-6q
-20 -20
3q=-6q-20
+6q +6q
9q=-20
__ __
9 9
__________________
q=-20/9 or q=20/-9
2007-06-09 04:39:20 · answer #7 · answered by Anonymous · 0⤊ 0⤋
No it is not. It is definitely -20/9
2007-06-09 04:26:26 · answer #8 · answered by DRA 1 · 0⤊ 0⤋
I agree with the other person... -20/9
2007-06-09 04:21:54 · answer #9 · answered by shekum 2 · 0⤊ 0⤋
I got it to be -20/9....yes...it is -20/9
2007-06-09 04:19:14 · answer #10 · answered by goldenret35 2 · 1⤊ 0⤋